Standard Lemma guide

underground

adj · adv · name · noun · verb · 18 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: /ˌʌn.dəˈɡɹaʊnd/
  • Northumbria: /ˌʊn.dɐˈɡɹʊnd/
  • General-American: /ˌʌn.dəɹˈɡɹaʊnd/
  • rhymes with -aʊnd
  • Received-Pronunciation, especially: /ˈʌn.də.ɡɹaʊnd/ for the
  • Southern-England: Recorded audio is listed in the source snapshot.
  • General-American, especially: /ˈʌn.dəɹ.ɡɹaʊnd/ for the
  • CMU ARPABET: AH1 N D ER0 G R AW2 N D Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Below the ground; below the surface of the Earth.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Examples

  • There is an underground tunnel that takes you across the river.

Meaning relationships

Synonyms: subterranean, hypogean

Antonyms: none provided

2

adj

Meaning 2

Hidden, furtive, secretive.

Definition source: English Wiktionary via Wiktextract

Usage: figuratively

Examples

  • These criminals operate through an underground network.

Meaning relationships

Synonyms: covered, concealed, dark, dern, hidden, invisible, inward, latent, nondisplayed, obfuscated, obfuscatory, obscure, obscured, occluded, occulted, private, recondite, secluded, secret, secreted, silent, snug, tect, unapparent, underground, undisclosed, veiled, abstruse, behind the scenes, catlike, backroom, stealth, clandestine, cloak-and-dagger, confidential, covert, deep-laid, disguised, furtive, huggermugger, hush-hush, inconspicuous, incognito, low profile, lurksome, lurky, mousy, off-the-books, on the down-low, on the sly, secretive, slinky, sly, sneaky, stealthy, sub rosa, surreptitious, under-the-table, under the radar, under wraps, undercover, unperceived

Antonyms: none provided

3

adj

Meaning 3

Of or relating to an art forms (such as music) or subculture that is outside the mainstream, especially one that is unofficial and hidden from the authorities.

Definition source: English Wiktionary via Wiktextract

Usage: figuratively

Examples

  • underground music

Meaning relationships

Synonyms: alternative, unconventional

Antonyms: mainstream

4

adv

Meaning 4

Below the ground.

Definition source: English Wiktionary via Wiktextract

Examples

  • The tunnel goes underground at this point.

Meaning relationships

Synonyms: below ground

Antonyms: none provided

5

adv

Meaning 5

Secretly.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: clandestinely, in secret, on the quiet

Antonyms: none provided

6

name

Meaning 6

The London Underground.

Definition source: English Wiktionary via Wiktextract

Usage: UK

Topics: rail-transport, railways, transport

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Tube

Antonyms: none provided

7

noun

Meaning 7

The regions beneath the surface of the earth, both natural (eg. caves) and man-made (eg. mines).

Definition source: English Wiktionary via Wiktextract

Topics: geography, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

Synonym of subway: a railway that is under the ground.

Definition source: English Wiktionary via Wiktextract

Usage: UK

Examples

  • London Underground

Meaning relationships

Synonyms: underground railway, subway

Antonyms: none provided

9

noun

Meaning 9

A movement or organization of people who resist political convention.

Definition source: English Wiktionary via Wiktextract

Usage: with-definite-article

Examples

  • the French underground during World War II

Meaning relationships

Synonyms: resistance

Antonyms: none provided

10

noun

Meaning 10

A movement or organization of people who resist artistic convention.

Definition source: English Wiktionary via Wiktextract

Usage: with-definite-article

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: avant-garde, counterculture

Antonyms: none provided

11

verb

Meaning 11

To route electricity distribution cables underground.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

12

verb

Meaning 12

simple past and past participle of undergrind

Definition source: English Wiktionary via Wiktextract

Usage: form-of, participle, past

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

13

adjective satellite

Meaning 13

conducted with or marked by hidden aims or methods

Definition source: Princeton WordNet 3.0

Examples

  • clandestine intelligence operations
  • cloak-and-dagger activities behind enemy lines
  • hole-and-corner intrigue
  • secret missions
  • a secret agent
  • secret sales of arms
  • surreptitious mobilization of troops
  • an undercover investigation
  • underground resistance

Meaning relationships

Synonyms: clandestine, cloak-and-dagger, hole-and-corner(a), hugger-mugger, hush-hush, secret, surreptitious, undercover

Antonyms: none provided

14

adjective satellite

Meaning 14

under the level of the ground

Definition source: Princeton WordNet 3.0

Examples

  • belowground storage areas
  • underground caverns

Meaning relationships

Synonyms: belowground

Antonyms: none provided

15

adverb

Meaning 15

beneath the surface of the earth

Definition source: Princeton WordNet 3.0

Examples

  • water flowing underground

Meaning relationships

Synonyms: none provided

Antonyms: none provided

16

adverb

Meaning 16

in or into hiding or secret operation

Definition source: Princeton WordNet 3.0

Examples

  • the organization was driven underground

Meaning relationships

Synonyms: none provided

Antonyms: none provided

17

noun

Meaning 17

an electric railway operating below the surface of the ground (usually in a city)

Definition source: Princeton WordNet 3.0

Examples

  • in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'

Meaning relationships

Synonyms: metro, tube, subway system, subway

Antonyms: none provided

Broader terms: railway, railroad, railroad line, railway line, railway system

18

noun

Meaning 18

a secret group organized to overthrow a government or occupation force

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: resistance

Antonyms: none provided

Broader terms: revolutionary group

Narrower terms: Maquis

History

Etymology

From Middle English undergrounde (adverb), equivalent to under + ground or under- + ground. Compare Dutch ondergrond, ondergronds, German Untergrund, Danish undergrunds.

See the etymology of the corresponding lemma form.

Across languages

Translations

176 source translations are retained for this English entry.

  • Armenian: ընդերկրյա (ənderkrya) — below the ground — see also subterranean
  • Armenian: ստորգետնյա (storgetnya) — below the ground — see also subterranean
  • Belarusian: падзе́мны (padzjémny) — below the ground — see also subterranean
  • Bulgarian: подзе́мен (podzémen) — below the ground — see also subterranean
  • Catalan: subterrani — below the ground — see also subterranean
  • Chinese Mandarin: 地下 (dìxià) — below the ground — see also subterranean
  • Czech: podzemní — below the ground — see also subterranean
  • Dutch: ondergronds — below the ground — see also subterranean
  • Esperanto: subtera — below the ground — see also subterranean
  • Finnish: maanalainen — below the ground — see also subterranean
  • French: souterrain — below the ground — see also subterranean
  • Georgian: მიწისქვეშა (mic̣iskveša) — below the ground — see also subterranean
  • German: unterirdisch — below the ground — see also subterranean
  • German: Untegrund- — below the ground — see also subterranean
  • Greek: υπόγειος (ypógeios) — below the ground — see also subterranean
  • Ancient Greek: ὑπόγειος (hupógeios) — below the ground — see also subterranean
  • Ancient Greek: ὑπόνομος (hupónomos) — below the ground — see also subterranean
  • Ancient Greek: χθόνιος (khthónios) — below the ground — see also subterranean
  • Hindi: भूमिगत (bhūmigat) — below the ground — see also subterranean
  • Hindi: अंतर्भौम (antarbhaum) — below the ground — see also subterranean
  • Hindi: ज़मींदोज़ (zamīndoz) — below the ground — see also subterranean
  • Hindi: भूगर्भस्थ (bhūgarbhasth) — below the ground — see also subterranean
  • Hindi: भूगर्भिक (bhūgarbhik) — below the ground — see also subterranean
  • Hungarian: föld alatti — below the ground — see also subterranean
  • Icelandic: neðanjarðar — below the ground — see also subterranean
  • Ido: subtera — below the ground — see also subterranean
  • Ingrian: maanalain — below the ground — see also subterranean
  • Italian: sotterraneo — below the ground — see also subterranean
  • Japanese: 地下 (chika) — below the ground — see also subterranean
  • Korean: 땅속 (ttangsok) — below the ground — see also subterranean
  • Korean: 땅굴 (ttanggul) — below the ground — see also subterranean
  • Korean: 땅밑 (ttangmit) — below the ground — see also subterranean
  • Korean: 땅아래 (ttang'arae) — below the ground — see also subterranean
  • Korean: 지하 (jiha) — below the ground — see also subterranean
  • Latin: subterrāneus — below the ground — see also subterranean
  • Macedonian: подземен (podzemen) — below the ground — see also subterranean
  • Malay: bawah tanah — below the ground — see also subterranean
  • Malay: banah — below the ground — see also subterranean
  • Māori: rarowhenua — below the ground — see also subterranean
  • Norwegian Bokmål: underjordisk — below the ground — see also subterranean
  • Polish: podziemny — below the ground — see also subterranean
  • Portuguese: subterrâneo — below the ground — see also subterranean
  • Romanian: subteran — below the ground — see also subterranean
  • Russian: подзе́мный (podzémnyj) — below the ground — see also subterranean
  • Serbo-Croatian: подземан — below the ground — see also subterranean
  • Serbo-Croatian: podzeman — below the ground — see also subterranean
  • Slovak: podzemný — below the ground — see also subterranean
  • Slovene: podzemen — below the ground — see also subterranean
  • Spanish: subterráneo — below the ground — see also subterranean
  • Spanish: soterraño — below the ground — see also subterranean
  • Spanish: soterráneo (disused) — below the ground — see also subterranean
  • Spanish: soterrano — below the ground — see also subterranean
  • Swedish: underjordisk — below the ground — see also subterranean
  • Ukrainian: підзе́мний (pidzémnyj) — below the ground — see also subterranean
  • Unami: hakink — below the ground — see also subterranean
  • Welsh: tanddaearol — below the ground — see also subterranean
  • Yiddish: אונטערגרונט (untergrunt) — below the ground — see also subterranean
  • Yiddish: אונטערערדיש (untererdish) — below the ground — see also subterranean
  • Bulgarian: та́ен (táen) — hidden, furtive
  • Bulgarian: подмо́лен (podmólen) — hidden, furtive
  • Catalan: clandestí — hidden, furtive
  • Catalan: secret — hidden, furtive
  • Chinese Mandarin: 地下的 (dìxià de) — hidden, furtive
  • Chinese Mandarin: 秘密的 (mìmì de) — hidden, furtive
  • Chinese Mandarin: 暗中的 (ànzhōng de) — hidden, furtive
  • Dutch: ondergronds — hidden, furtive
  • Finnish: maanalainen — hidden, furtive
  • French: souterrain — hidden, furtive
  • French: clandestin — hidden, furtive
  • Georgian: იატაკქვეშა (iaṭaḳkveša) — hidden, furtive
  • Georgian: საიდუმლო (saidumlo) — hidden, furtive
  • Georgian: ფარული (paruli) — hidden, furtive
  • German: heimlich — hidden, furtive
  • German: geheim — hidden, furtive
  • German: Untergrund- — hidden, furtive
  • Greek: υπόγειος (ypógeios) — hidden, furtive
  • Greek: μυστικός (mystikós) — hidden, furtive
  • Greek: λαθραίος (lathraíos) — hidden, furtive
  • Hebrew: מַחְתַּרְתִּי (maẖtartí) — hidden, furtive
  • Hungarian: földalatti — hidden, furtive
  • Hungarian: illegális — hidden, furtive
  • Hungarian: rejtett — hidden, furtive
  • Hungarian: titkos — hidden, furtive
  • Italian: clandestino — hidden, furtive
  • Japanese: 秘密の (himitsu no) — hidden, furtive
  • Japanese: 不法の (fuhō no) — hidden, furtive
  • Japanese: アングラ (angura) — hidden, furtive
  • Macedonian: потаен (potaen) — hidden, furtive
  • Polish: podziemny — hidden, furtive
  • Portuguese: clandestino — hidden, furtive
  • Portuguese: secreto — hidden, furtive
  • Russian: подпо́льный (podpólʹnyj) — hidden, furtive
  • Serbo-Croatian: прикрѝвен — hidden, furtive
  • Serbo-Croatian: по̏та̄јан — hidden, furtive
  • Serbo-Croatian: prikrìven — hidden, furtive
  • Serbo-Croatian: pȍtājan — hidden, furtive
  • Yiddish: אונטערערדיש (untererdish) — hidden, furtive
  • Bulgarian: ъндърграунд (ǎndǎrgraund) — outside the mainstream
  • Chinese Mandarin: 非主流 (fēi zhǔliú) — outside the mainstream
  • Dutch: underground — outside the mainstream
  • Finnish: underground — outside the mainstream
  • French: underground — outside the mainstream
  • French: alternatif — outside the mainstream
  • German: Untegrund- — outside the mainstream
  • Greek: υπόγειος (ypógeios) — outside the mainstream
  • Greek: περιθωριακός (perithoriakós) — outside the mainstream
  • Hungarian: alternatív — outside the mainstream
  • Japanese: アングラ (angura) — outside the mainstream
  • Polish: undergroundowy — outside the mainstream
  • Portuguese: underground — outside the mainstream
  • Portuguese: alternativo — outside the mainstream
  • Russian: андергра́унд (andɛrgráund) — outside the mainstream
  • Russian: андегра́унд (andɛgráund) — outside the mainstream
  • Serbo-Croatian: подземан — outside the mainstream
  • Serbo-Croatian: podzeman — outside the mainstream
  • Turkish: yer altı — outside the mainstream
  • Turkish: underground — outside the mainstream
  • Ukrainian: андергра́ундовий (anderhráundovyj) — outside the mainstream
  • Ukrainian: андегра́ундовий (andehráundovyj) — outside the mainstream
  • Bulgarian: под земята (pod zemjata) — below the ground
  • Chinese Mandarin: 地下 (dìxià) — below the ground
  • Finnish: maan alla — below the ground
  • French: sous terre — below the ground
  • French: sous la terre — below the ground
  • Galician: baixo terra — below the ground
  • German: unter der Erde — below the ground
  • German: unterirdisch — below the ground
  • Greek: υπόγεια (ypógeia) — below the ground
  • Icelandic: neðanjarðar — below the ground
  • Italian: sottoterra — below the ground
  • Navajo: łeeyiʼ — below the ground
  • Portuguese: debaixo da terra — below the ground
  • Portuguese: debaixo do solo — below the ground
  • Russian: под землёй (pod zemljój) — below the ground
  • Czech: podzemí — regions beneath the surface of the earth
  • Hindi: भूगर्भ (bhūgarbh) — regions beneath the surface of the earth
  • Hindi: अंतर्भूमि (antarbhūmi) — regions beneath the surface of the earth
  • Hindi: भूमिगत (bhūmigat) — regions beneath the surface of the earth
  • Portuguese: subsolo — regions beneath the surface of the earth
  • Portuguese: subterrâneo — regions beneath the surface of the earth
  • Armenian: ընդհատակ (əndhatak) — movement or organisation of people who resist political convention
  • Bulgarian: нелегална организация (nelegalna organizacija) — movement or organisation of people who resist political convention
  • Finnish: vastarintaliike — movement or organisation of people who resist political convention
  • French: résistance — movement or organisation of people who resist political convention
  • French: mouvement clandestin — movement or organisation of people who resist political convention
  • French: organisation clandestine — movement or organisation of people who resist political convention
  • Georgian: იატაკქვეშა ორგანიზაცია (iaṭaḳkveša organizacia) — movement or organisation of people who resist political convention
  • German: Untergrundorganisation — movement or organisation of people who resist political convention
  • Hebrew: מַחְתֶּרֶת (maẖtéret) — movement or organisation of people who resist political convention
  • Irish: gluaiseacht faoi choim — movement or organisation of people who resist political convention
  • Italian: resistenza — movement or organisation of people who resist political convention
  • Italian: movimento clandestino — movement or organisation of people who resist political convention
  • Italian: organizzazione clandestina — movement or organisation of people who resist political convention
  • Macedonian: по́дземје (pódzemje) — movement or organisation of people who resist political convention
  • Polish: podziemie — movement or organisation of people who resist political convention
  • Polish: ruch oporu — movement or organisation of people who resist political convention
  • Portuguese: resistência — movement or organisation of people who resist political convention
  • Romanian: mișcare clandestină — movement or organisation of people who resist political convention
  • Romanian: organizație clandestină — movement or organisation of people who resist political convention
  • Russian: подпо́лье (podpólʹje) — movement or organisation of people who resist political convention
  • Spanish: movimiento clandestino — movement or organisation of people who resist political convention
  • Spanish: organización clandestina — movement or organisation of people who resist political convention
  • Bulgarian: ъндърграунд (ǎndǎrgraund) — movement or organisation of people who resist artistic convention
  • French: underground — movement or organisation of people who resist artistic convention
  • French: mouvement d'avant-garde — movement or organisation of people who resist artistic convention
  • German: Underground — movement or organisation of people who resist artistic convention
  • Italian: underground — movement or organisation of people who resist artistic convention
  • Macedonian: а́ндерграунд (ándergraund) — movement or organisation of people who resist artistic convention
  • Polish: podziemie — movement or organisation of people who resist artistic convention
  • Portuguese: submundo — movement or organisation of people who resist artistic convention
  • Russian: андергра́унд (andɛrgráund) — movement or organisation of people who resist artistic convention
  • Russian: андегра́унд (andɛgráund) — movement or organisation of people who resist artistic convention
  • Ukrainian: андергра́унд (anderhráund) — movement or organisation of people who resist artistic convention
  • Ukrainian: андегра́унд (andehráund) — movement or organisation of people who resist artistic convention
  • Bulgarian: прокарвам под земята (prokarvam pod zemjata) — to route electricity distribution cables underground
  • Greek: υπογειώνω (ypogeióno) — to route electricity distribution cables underground
Real reading context

underground in complete knowledge articles