Standard Lemma guide

unknown

adj · noun · verb · 13 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.

  • UK: /ʌn(ˈn)əʊn/
  • US: ŭn-nōnʹ
  • US: /ʌnˈnoʊn/
  • US: Recorded audio is listed in the source snapshot.
  • rhymes with -əʊn
  • CMU ARPABET: AH0 N N OW1 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Not known; unidentified; not well known.

Definition source: English Wiktionary via Wiktextract

Usage: postpositional, sometimes

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: anonymous, unfamiliar, uncharted, undiscovered, unexplored, unidentified, unnamed, unrecognized, unrevealed, unascertained, obscure, unsung

Antonyms: well-known, famous, known

2

noun

Meaning 2

A variable (usually x, y or z) whose value is to be found.

Definition source: English Wiktionary via Wiktextract

Topics: algebra, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Any thing, place, or situation about which nothing is known; an unknown fact or piece of information.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

A person of no identity; a nonentity.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

verb

Meaning 5

past participle of unknow

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

6

adjective

Meaning 6

not known

Definition source: Princeton WordNet 3.0

Examples

  • an unknown amount
  • an unknown island
  • an unknown writer
  • an unknown source

Meaning relationships

Synonyms: none provided

Antonyms: known

7

adjective satellite

Meaning 7

being or having an unknown or unnamed source

Definition source: Princeton WordNet 3.0

Examples

  • a poem by an unknown author
  • corporations responsible to nameless owners
  • an unnamed donor

Meaning relationships

Synonyms: nameless, unidentified, unnamed

Antonyms: none provided

8

adjective satellite

Meaning 8

not known before

Definition source: Princeton WordNet 3.0

Examples

  • used many strange words
  • saw many strange faces in the crowd
  • don't let anyone unknown into the house

Meaning relationships

Synonyms: strange

Antonyms: none provided

9

adjective satellite

Meaning 9

not famous or acclaimed

Definition source: Princeton WordNet 3.0

Examples

  • an obscure family
  • unsung heroes of the war

Meaning relationships

Synonyms: obscure, unsung

Antonyms: none provided

10

adjective satellite

Meaning 10

not known to exist

Definition source: Princeton WordNet 3.0

Examples

  • things obscurely felt surged up from unknown depths

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

noun

Meaning 11

a variable whose values are solutions of an equation

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: unknown quantity

Antonyms: none provided

Broader terms: variable

12

noun

Meaning 12

an unknown and unexplored region

Definition source: Princeton WordNet 3.0

Examples

  • they came like angels out the unknown

Meaning relationships

Synonyms: unknown region, terra incognita

Antonyms: none provided

Broader terms: region

13

noun

Meaning 13

anyone who does not belong in the environment in which they are found

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: stranger, alien

Antonyms: none provided

Broader terms: intruder, interloper, trespasser

Narrower terms: foreigner, outsider

History

Etymology

From Middle English *unknowen, *uniknowen, uniknowe, from Old English unġecnāwen (“unknown”), equivalent to un- + known.

Across languages

Translations

165 source translations are retained for this English entry.

  • Albanian: panjohur — not known
  • Arabic: مَجْهُول (majhūl) — not known
  • Arabic: مُبْهَم (mubham) — not known
  • Armenian: անհայտ (anhayt) — not known
  • Asturian: desconocíu — not known
  • Azerbaijani: məchul — not known
  • Azerbaijani: naməlum — not known
  • Azerbaijani: bilinməyən — not known
  • Belarusian: невядо́мы (njevjadómy) — not known
  • Belarusian: незнаёмы (njeznajómy) — not known
  • Bulgarian: неизве́стен (neizvésten) — not known
  • Bulgarian: незна́ен (neznáen) — not known
  • Catalan: desconegut — not known
  • Chinese Mandarin: 未知 (wèizhī) — not known
  • Chinese Mandarin: 不明 (bùmíng) — not known
  • Chukchi: гэвэты ваԓьын (gėvėty vaḷʹyn) — not known
  • Czech: neznámý — not known
  • Danish: ubekendt — not known
  • Danish: ukendt — not known
  • Dutch: onbekend — not known
  • Dutch: ongekend — not known
  • Dutch: ongeweten — not known
  • Esperanto: nekonata — not known
  • Estonian: tundmatu — not known
  • Finnish: tuntematon — not known
  • French: inconnu — not known
  • Galician: descoñecido — not known
  • Georgian: უცნობი (ucnobi) — not known
  • German: unbekannt — not known
  • Gothic: 𐌿𐌽𐌺𐌿𐌽𐌸𐍃 (unkunþs) — not known
  • Greek: άγνωστος (ágnostos) — not known
  • Ancient Greek: ἄγνωστος (ágnōstos) — not known
  • Ancient Greek: ἄγνωτος (ágnōtos) — not known
  • Hebrew: לא נודע — not known
  • Hindi: अनजान (anjān) — not known
  • Hindi: अनजाना (anjānā) — not known
  • Hindi: अजाना (ajānā) — not known
  • Hindi: अख्यात (akhyāt) — not known
  • Hindi: अज्ञात (ajñāt) — not known
  • Hindi: नामालूम (nāmālūm) — not known
  • Hindi: मजहूल (majhūl) — not known
  • Hungarian: ismeretlen — not known
  • Icelandic: óþekktur — not known
  • Icelandic: ókunnur — not known
  • Indonesian: tak diketahui — not known
  • Ingrian: tiitämätöin — not known
  • Italian: ignoto — not known
  • Italian: sconosciuto — not known
  • Japanese: 未知の (michi no) — not known
  • Japanese: 無名な (mumei na) — not known
  • Japanese: 不明な (fumei na) — not known
  • Kazakh: белгісіз (belgısız) — not known
  • Kazakh: беймәлім (beimälım) — not known
  • Kazakh: мәлімсіз (mälımsız) — not known
  • Korean: 미지(未知)의 (miji-ui) — not known
  • Korean: 무명(無名)의 (mumyeong-ui) — not known
  • Korean: 불명(不明)의 (bulmyeong-ui) — not known
  • Central Kurdish: نەناسراو (nenasraw) — not known
  • Kyrgyz: белгисиз (belgisiz) — not known
  • Latin: incognitus — not known
  • Latin: ignoratus — not known
  • Latin: ignotus — not known
  • Latin: nescitus — not known
  • Latin: obscurus — not known
  • Latvian: nepazīstams — not known
  • Latvian: svešs — not known
  • Lithuanian: nežinomas — not known
  • Macedonian: непознат (nepoznat) — not known
  • Norwegian Bokmål: ukjent — not known
  • Norwegian Nynorsk: ukjent — not known
  • Occitan: desconegut — not known
  • Persian: مجهول (majhul) — not known
  • Plautdietsch: onbekaunt — not known
  • Polish: nieznany — not known
  • Polish: nieznajomy — not known
  • Polish: niewiadomy — not known
  • Portuguese: desconhecido — not known
  • Romanian: necunoscut — not known
  • Romanian: neștiut — not known
  • Romanian: obscur — not known
  • Russian: неизве́стный (neizvéstnyj) — not known
  • Russian: незнако́мый (neznakómyj) — not known
  • Russian: неве́домый (nevédomyj) — not known
  • Sanskrit: अज्ञात (ajñāta) — not known
  • Serbo-Croatian: не̏познат — not known
  • Serbo-Croatian: nȅpoznat — not known
  • Sicilian: scanusciutu — not known
  • Slovak: neznámy — not known
  • Slovene: neznan — not known
  • Slovene: nepoznan — not known
  • Spanish: ignoto — not known
  • Spanish: desconocido — not known
  • Swedish: okänd — not known
  • Tajik: номаълум (noma'lum) — not known
  • Tajik: ношинос (nošinos) — not known
  • Tajik: маҷҳул (majhul) — not known
  • Turkish: bilinmeyen — not known
  • Turkish: bilinmez — not known
  • Turkish: meçhul — not known
  • Ottoman Turkish: بللیسز (bellisiz) — not known
  • Ukrainian: невідо́мий (nevidómyj) — not known
  • Ukrainian: незна́ний (neznányj) — not known
  • Ukrainian: незнайо́мий (neznajómyj) — not known
  • Uzbek: nomaʼlum — not known
  • Uzbek: majhul — not known
  • Vietnamese: không biết — not known
  • Welsh: anhysbys — not known
  • Zazaki: nêzanıyen — not known
  • Zazaki: mechul — not known
  • Zazaki: nêzanıyaye — not known
  • Arabic: مُتَغَيِّر (mutaḡayyir) — algebra: a variable whose value is to be found
  • Armenian: անհայտ (anhayt) — algebra: a variable whose value is to be found
  • Bulgarian: неизвестно (neizvestno) — algebra: a variable whose value is to be found
  • Catalan: incògnita — algebra: a variable whose value is to be found
  • Chinese Mandarin: 未知數 /未知数 (wèizhīshù) — algebra: a variable whose value is to be found
  • Czech: neznámá — algebra: a variable whose value is to be found
  • Estonian: tundmatu — algebra: a variable whose value is to be found
  • Finnish: tuntematon — algebra: a variable whose value is to be found
  • French: inconnue — algebra: a variable whose value is to be found
  • Galician: incógnita — algebra: a variable whose value is to be found
  • German: Unbekannte — algebra: a variable whose value is to be found
  • Greek: άγνωστος (ágnostos) — algebra: a variable whose value is to be found
  • Hungarian: ismeretlen — algebra: a variable whose value is to be found
  • Icelandic: óþekkt stærð — algebra: a variable whose value is to be found
  • Japanese: 未知 (michi) — algebra: a variable whose value is to be found
  • Japanese: 未知数 (michisū) — algebra: a variable whose value is to be found
  • Latin: incognitus — algebra: a variable whose value is to be found
  • Latin: incogniti — algebra: a variable whose value is to be found
  • Latin: incognita — algebra: a variable whose value is to be found
  • Latin: incognitae — algebra: a variable whose value is to be found
  • Latin: incognitum — algebra: a variable whose value is to be found
  • Latin: incognita — algebra: a variable whose value is to be found
  • Latvian: nezināmais — algebra: a variable whose value is to be found
  • Lithuanian: nežinomasis — algebra: a variable whose value is to be found
  • Macedonian: непозната (nepoznata) — algebra: a variable whose value is to be found
  • Norwegian Bokmål: ukjent — algebra: a variable whose value is to be found
  • Polish: niewiadoma — algebra: a variable whose value is to be found
  • Portuguese: incógnita — algebra: a variable whose value is to be found
  • Romanian: necunoscută — algebra: a variable whose value is to be found
  • Serbo-Croatian: непозната — algebra: a variable whose value is to be found
  • Serbo-Croatian: nepoznata — algebra: a variable whose value is to be found
  • Spanish: incógnita — algebra: a variable whose value is to be found
  • Turkish: değişken — algebra: a variable whose value is to be found
  • Ukrainian: невідома (nevidoma) — algebra: a variable whose value is to be found
  • Welsh: anhysbysyn — algebra: a variable whose value is to be found
  • Zazaki: vurnaynoğ — algebra: a variable whose value is to be found
  • Arabic: غَامِض (ḡāmiḍ) — fact or place
  • Arabic: غَوَامِض (ḡawāmiḍ) — fact or place
  • Finnish: tuntematon — fact or place
  • French: inconnu — fact or place
  • Galician: descoñecido — fact or place
  • Hungarian: ismeretlen — fact or place
  • Portuguese: desconhecido — fact or place
  • Spanish: desconocido — fact or place
  • Arabic: مَجْهُول (majhūl) — person of no identity
  • Arabic: مُبْهَم (mubham) — person of no identity
  • Chinese Mandarin: 無名氏 /无名氏 (wúmíngshì) — person of no identity
  • Galician: descoñecido — person of no identity
  • Galician: descoñecida — person of no identity
  • German: Unbekannter — person of no identity
  • Hungarian: idegen — person of no identity
  • Italian: carneade — person of no identity
  • Japanese: 名無し (nanashi) — person of no identity
  • Portuguese: desconhecido — person of no identity
  • Swedish: okänd — person of no identity
Real reading context

unknown in complete knowledge articles