Standard Lemma guide

concave

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: /ˈkɒn.keɪv/
  • UK: /kɒnˈkeɪv/
  • US: /ˈkɑn.keɪv/
  • US: /kɑnˈkeɪv/
  • US: /kənˈkeɪv/
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: K AA0 N K EY1 V Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
  • CMU ARPABET 2: K AA1 N K EY0 V Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Curved like the inner surface of a sphere or bowl.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Not convex; having at least one internal angle greater than 180 degrees.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: geometry, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Satisfying the property that all segments connecting two points on the function's graph lie below the function.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Qualifier: functional analysis

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adj

Meaning 4

Hollow; empty.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

A concave surface or curve.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

The vault of the sky.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

One of the celestial spheres of the Ptolemaic or geocentric model of the world.

Definition source: English Wiktionary via Wiktextract

Examples

  • Aristotle makes [Fire] to move to the concave of the Moon. - Thomas Salusbury (1661).

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.

Definition source: English Wiktionary via Wiktextract

Topics: business, manufacturing

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

noun

Meaning 9

An indentation running along the base of a surfboard, intended to increase lift.

Definition source: English Wiktionary via Wiktextract

Topics: hobbies, lifestyle, sports, surfing

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

noun

Meaning 10

An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.

Definition source: English Wiktionary via Wiktextract

Topics: hobbies, lifestyle, skateboarding, sports

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

noun

Meaning 11

A playing card made concave for use in cheating.

Definition source: English Wiktionary via Wiktextract

Topics: gambling, games

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

12

verb

Meaning 12

To render concave, or increase the degree of concavity.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

13

adjective

Meaning 13

curving inward

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: convex

History

Etymology

From Middle English concave, from Old French concave, from Latin concavus.

Across languages

Translations

63 source translations are retained for this English entry.

  • Ahtna: tsʼagh — curved inward
  • Arabic: مُقَعَّر (muqaʕʕar) — curved inward
  • Arabic: مُجَوَّف (mujawwaf) — curved inward
  • Armenian: գոգավոր (gogavor) — curved inward
  • Asturian: cóncavu — curved inward
  • Bengali: অবতল (obotol) — curved inward
  • Bulgarian: вдлъбнат (vdlǎbnat) — curved inward
  • Catalan: còncau — curved inward
  • Chinese Mandarin: 凹 (āo) — curved inward
  • Cornish: kowgrom — curved inward
  • Czech: vydutý — curved inward
  • Czech: konkávní — curved inward
  • Danish: konkav — curved inward
  • Dutch: hol — curved inward
  • Esperanto: kava — curved inward
  • Estonian: nõgus — curved inward
  • Faroese: innskaraður — curved inward
  • Faroese: innhjólaður — curved inward
  • Finnish: kovera — curved inward
  • Finnish: konkaavi — curved inward
  • French: concave — curved inward
  • Galician: cóncavo — curved inward
  • German: konkav — curved inward
  • German: nach innen gewölbt — curved inward
  • German: eingewölbt — curved inward
  • Greek: κοίλος (koílos) — curved inward
  • Hawaiian: ʻeʻele — curved inward
  • Hungarian: homorú — curved inward
  • Hungarian: konkáv — curved inward
  • Icelandic: íhvolfur — curved inward
  • Indonesian: cekung — curved inward
  • Italian: concavo — curved inward
  • Japanese: 凹面 (ōmen) — curved inward
  • Kazakh: ойыс (oiys) — curved inward
  • Korean: 요면 (yomyeon) — curved inward
  • Latin: concavus — curved inward
  • Māori: areare — curved inward
  • Māori: kōpapa — curved inward
  • Norwegian Bokmål: konkav — curved inward
  • Norwegian Nynorsk: konkav — curved inward
  • Persian: کاو (kâv) — curved inward
  • Polish: wklęsły — curved inward
  • Portuguese: côncavo — curved inward
  • Romanian: concav — curved inward
  • Russian: во́гнутый (vógnutyj) — curved inward
  • Slovak: dutý — curved inward
  • Slovak: vydutý — curved inward
  • Slovak: konkávny — curved inward
  • Spanish: cóncavo — curved inward
  • Swedish: konkav — curved inward
  • Tagalog: malukong — curved inward
  • Tày: boóng — curved inward
  • Thai: เว้า (wáo) — curved inward
  • Turkish: konkav — curved inward
  • Turkish: içbükey — curved inward
  • Vietnamese: lõm — curved inward
  • Welsh: ceugrwm — curved inward
  • Welsh: ceugrom — curved inward
  • Bulgarian: вдлъбнатина (vdlǎbnatina) — A concave surface or curve
  • Northern Kurdish: rûçal — A concave surface or curve
  • Russian: невы́пуклый (nevýpuklyj) — A concave surface or curve
  • Thai: รูปร่างที่นูน — A concave surface or curve
  • Bulgarian: вдлъбвам (vdlǎbvam) — To render concave, or increase the degree of concavity.
Real reading context

concave in complete knowledge articles