Standard Lemma guide

flatten

verb · 12 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.

  • /ˈflæ.tən/
  • [ˈflæ.tn̩]
  • [flæ.ʔn̩]
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -ætən
  • CMU ARPABET: F L AE1 T AH0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

verb

Meaning 1

To make something flat or flatter.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Examples

  • As there was a lot of damage, we chose the heavy roller to flatten the pitch.
  • Mary would flatten the dough before rolling it into pretzels.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

verb

Meaning 2

To press one's body tightly against a surface, such as a wall or floor, especially in order to avoid being seen or harmed.

Definition source: English Wiktionary via Wiktextract

Usage: reflexive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

verb

Meaning 3

To knock down or lay low.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Examples

  • The prize fighter quickly flattened his challenger.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

verb

Meaning 4

To become flat or flatter; to plateau.

Definition source: English Wiktionary via Wiktextract

Usage: intransitive

Examples

  • Prices have flattened out.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

verb

Meaning 5

To be knocked down or laid low.

Definition source: English Wiktionary via Wiktextract

Usage: intransitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

verb

Meaning 6

To lower by a semitone.

Definition source: English Wiktionary via Wiktextract

Topics: entertainment, lifestyle, music

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

verb

Meaning 7

To make vapid or insipid; to render stale.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

verb

Meaning 8

To reduce (a data structure) to one that has fewer dimensions, e.g. a 2×2 array into a list of four elements.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Topics: computing, engineering, mathematics, natural-sciences, physical-sciences, programming, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

verb

Meaning 9

To combine (separate layers) into a single image.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Topics: computer-graphics, computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

verb

Meaning 10

lower the pitch of (musical notes)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: drop

Antonyms: sharpen

Broader terms: change, alter, modify

11

verb

Meaning 11

become flat or flatter

Definition source: Princeton WordNet 3.0

Examples

  • The landscape flattened

Meaning relationships

Synonyms: flatten out

Antonyms: none provided

Broader terms: change shape, change form, deform

Narrower terms: splat, press

12

verb

Meaning 12

make flat or flatter

Definition source: Princeton WordNet 3.0

Examples

  • flatten a road
  • flatten your stomach with these exercises

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: shape, form

Narrower terms: steamroll, steamroller, splat, roll out, roll, laminate

History

Etymology

Etymology tree Proto-Germanic *flataz Old Norse flatrbor. Middle English flat English flat English -en English flatten From flat + -en.

Across languages

Translations

106 source translations are retained for this English entry.

  • Arabic: سَطَّح (saṭṭaḥ) — to make something flat
  • Arabic: بطط (baṭaṭ) — to make something flat
  • Arabic: سطح (saṭṭaḥ) — to make something flat
  • Bulgarian: изравнявам (izravnjavam) — to make something flat
  • Bulgarian: изглаждам (izglaždam) — to make something flat
  • Catalan: planejar — to make something flat
  • Catalan: aplanar — to make something flat
  • Chinese Mandarin: 壓平 /压平 (yāpíng) — to make something flat
  • Chinese Mandarin: 壓扁 /压扁 (yābiǎn) — to make something flat
  • Chinese Mandarin: 夷平 (yípíng) — to make something flat
  • Czech: zploštit — to make something flat
  • Czech: zplacatit — to make something flat
  • Czech: splácnout — to make something flat
  • Danish: jævne — to make something flat
  • Dutch: pletten — to make something flat
  • Finnish: litistää — to make something flat
  • Finnish: tasoittaa — to make something flat
  • French: aplatir — to make something flat
  • Galician: achandar — to make something flat
  • Galician: achanzar — to make something flat
  • Galician: achairar — to make something flat
  • Georgian: აბრტყელებს (abrṭq̇elebs) — to make something flat
  • Georgian: გააბრტყელებს (gaabrṭq̇elebs) — to make something flat
  • German: plätten — to make something flat
  • German: flachmachen — to make something flat
  • German: planieren — to make something flat
  • Hungarian: lapít — to make something flat
  • Hungarian: kilapít — to make something flat
  • Hungarian: lelapít — to make something flat
  • Hungarian: nyújt — to make something flat
  • Hungarian: kinyújt — to make something flat
  • Hungarian: szétnyújt — to make something flat
  • Ido: presegar — to make something flat
  • Ingrian: lutistaa — to make something flat
  • Italian: appiattire — to make something flat
  • Lithuanian: išlyginti — to make something flat
  • Māori: takapapa — to make something flat
  • Māori: whakatūpā — to make something flat
  • Māori: tāmoe — to make something flat
  • Māori: papatau — to make something flat
  • Māori: tāpapa — to make something flat
  • Norwegian Nynorsk: flata ut — to make something flat
  • Polish: spłaszczyć — to make something flat
  • Polish: wyrównać — to make something flat
  • Polish: równać — to make something flat
  • Portuguese: achatar — to make something flat
  • Portuguese: espalmar — to make something flat
  • Romanian: nivela — to make something flat
  • Romanian: netezi — to make something flat
  • Romanian: aplatiza — to make something flat
  • Romanian: turti — to make something flat
  • Russian: раска́тывать (raskátyvatʹ) — to make something flat
  • Russian: раската́ть (raskatátʹ) — to make something flat
  • Russian: разгла́живать (razgláživatʹ) — to make something flat
  • Russian: разгла́дить (razgláditʹ) — to make something flat
  • Russian: плю́щить (pljúščitʹ) — to make something flat
  • Russian: расплю́щивать (raspljúščivatʹ) — to make something flat
  • Russian: расплю́щить (raspljúščitʹ) — to make something flat
  • Lower Sorbian: planěrowaś — to make something flat
  • Spanish: aplanar — to make something flat
  • Spanish: achatar — to make something flat
  • Spanish: explanar — to make something flat
  • Spanish: enrasar — to make something flat
  • Spanish: allanar — to make something flat
  • Swedish: platta till — to make something flat
  • Turkish: yasmak — to make something flat
  • Ottoman Turkish: یاصمق (yasmak) — to make something flat
  • Ottoman Turkish: دوزلهمك (düzlemek) — to make something flat
  • Finnish: mennä matalaksi — to press one's body tightly against a surface
  • Finnish: mennä litteäksi — to press one's body tightly against a surface
  • Bulgarian: просвам (prosvam) — to knock down or lay low
  • Czech: uzemnit — to knock down or lay low
  • Czech: srazit k zemi — to knock down or lay low
  • Czech: rozdrtit — to knock down or lay low
  • Dutch: aandrukken — to knock down or lay low
  • Finnish: lyödä — to knock down or lay low
  • Finnish: lyödä maahan — to knock down or lay low
  • Finnish: tyrmätä — to knock down or lay low
  • German: plattmachen — to knock down or lay low
  • Italian: atterrare — to knock down or lay low
  • Polish: położyć — to knock down or lay low
  • Polish: kłaść — to knock down or lay low
  • Polish: zwalić — to knock down or lay low
  • Polish: zwalać — to knock down or lay low
  • Portuguese: derrubar — to knock down or lay low
  • Russian: разма́зать (razmázatʹ) — to knock down or lay low
  • Catalan: aplanar-se — to become flat
  • Czech: zploštit se — to become flat
  • Czech: zplacatit se — to become flat
  • Czech: splácnout se — to become flat
  • Finnish: tasoittua — to become flat
  • Finnish: tasaantua — to become flat
  • Hungarian: lapul — to become flat
  • Hungarian: odalapul — to become flat
  • Hungarian: lelapul — to become flat
  • Hungarian: kilapul — to become flat
  • Hungarian: kinyúlik — to become flat
  • Hungarian: szétnyúlik — to become flat
  • Hungarian: leereszt — to become flat
  • Italian: appiattirsi — to become flat
  • Polish: spłaszczyć się — to become flat
  • Polish: wyrównać się — to become flat
  • Spanish: aplanarse — to become flat
  • Spanish: achatarse — to become flat
  • Finnish: väljähdyttää — to make vapid or insipid; to render stale
  • Japanese: 統合する (tōgō suru) — computer graphics: to combine into a single image
Real reading context

flatten in complete knowledge articles