Standard Lemma guide

lux

name · noun · verb · 4 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.

  • /lʌks/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • homophone: lucks
  • rhymes with -ʌks
  • CMU ARPABET: L AH1 K S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

name

Meaning 1

A surname.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

In the International System of Units, the derived unit of illuminance or illumination; one lumen per square metre. Symbol: lx

Definition source: English Wiktionary via Wiktextract

Examples

  • For quotations using this term, see Citations:lux.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

verb

Meaning 3

To dislocate; to luxate.

Definition source: English Wiktionary via Wiktextract

Usage: obsolete, transitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

a unit of illumination equal to 1 lumen per square meter; 0.0929 foot candle

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: lx

Antonyms: none provided

Broader terms: illumination unit

History

Etymology

Borrowed from Latin lūx (“light”), from Proto-Indo-European *lewk- (“white; light; bright”). Cognates include Ancient Greek λευκός (leukós, “white, blank, light, bright, clear”), Ancient Greek λύκη (lúkē, “light, morning twilight”), Sanskrit रोचते (rocate), Middle Persian 𐭩𐭥𐭬 (rōz, “day”) and Old English lēoht (noun) (English light).

Compare French luxer. See luxate.

Across languages

Translations

21 source translations are retained for this English entry.

  • Bulgarian: лукс (luks) — the derived unit of illuminance
  • Chinese Mandarin: 勒克斯 (lèkèsī) — the derived unit of illuminance
  • Czech: lux — the derived unit of illuminance
  • Esperanto: lukso — the derived unit of illuminance
  • Finnish: luksi — the derived unit of illuminance
  • French: lux — the derived unit of illuminance
  • German: Lux — the derived unit of illuminance
  • Greek: λουξ (loux) — the derived unit of illuminance
  • Indonesian: lux — the derived unit of illuminance
  • Italian: lux — the derived unit of illuminance
  • Japanese: ルクス (rukusu) — the derived unit of illuminance
  • Korean: 럭스 (reokseu) — the derived unit of illuminance
  • Lithuanian: liuksas — the derived unit of illuminance
  • Malay: lux — the derived unit of illuminance
  • Polish: luks — the derived unit of illuminance
  • Portuguese: lux — the derived unit of illuminance
  • Romanian: lux — the derived unit of illuminance
  • Russian: люкс (ljuks) — the derived unit of illuminance
  • Spanish: lux — the derived unit of illuminance
  • Swedish: lux — the derived unit of illuminance
  • Thai: ลักซ์ (lák) — the derived unit of illuminance