Meanings
lux1
plural luxes · plural rare luces
- In the International System of Units, the derived unit of illuminance or illumination; one lumen per square metre. Symbol: lx
For quotations using this term, see Citations:lux.
1 more example
Some volunteers slept in ambient light of about 100 lux and some in only 3 lux, which is close to total darkness.
2025 December 9, Veronique Greenwood, “Your Bedroom Probably Isn't Dark Enough”, in TIME
lux2
present singular third person luxes · participle present luxing · participle past luxed · past luxed
- obsoletetransitiveTo dislocate; to luxate.
the bones are simply luxed without being broken
1835, Alfred Velpeau, Granville Sharp Pattison, New Elements of Operative Surgery1 more example
and as I reel'd I fell, / Lux'd the neck-joint—my soul descends to hell.
1726, Homer, translated by Alexander Pope, The Odyssey
Lux3
Synonyms & antonyms
nouna unit of illumination equal to 1 lumen per square meter; 0.0929 foot candle
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
lux · noun
- Proto-Indo-European*lewk-“white; light; bright”
- Latinlūx“light”
- Englishlux
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).
More words from Latin, Proto-Indo-European
Full word history & related roots →Translations
Bulgarian лукс
- лукс (luks)the derived unit of illuminance
Chinese Mandarin 勒克斯
- 勒克斯 (lèkèsī)the derived unit of illuminance
Czech lux
- luxthe derived unit of illuminance
Esperanto lukso
- luksothe derived unit of illuminance
Finnish luksi
- luksithe derived unit of illuminance
French lux
- luxthe derived unit of illuminance
German Lux
- Luxthe derived unit of illuminance
Greek λουξ
- λουξ (loux)the derived unit of illuminance
Indonesian lux
- luxthe derived unit of illuminance
Italian lux
- luxthe derived unit of illuminance
Japanese ルクス
- ルクス (rukusu)the derived unit of illuminance
Korean 럭스
- 럭스 (reokseu)the derived unit of illuminance
Lithuanian liuksas
- liuksasthe derived unit of illuminance
Malay lux
- luxthe derived unit of illuminance
Polish luks
- luksthe derived unit of illuminance
Portuguese lux
- luxthe derived unit of illuminance
Romanian lux
- luxthe derived unit of illuminance
Russian люкс
- люкс (ljuks)the derived unit of illuminance
Spanish lux
- luxthe derived unit of illuminance
Swedish lux
- luxthe derived unit of illuminance
Thai ลักซ์
- ลักซ์ (lák)the derived unit of illuminance
Rhymes & wordplay
Rhymes with lux
All rhymes →Sounds the same
Cite this entry
lux. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/lux
“lux.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/lux. Accessed November 2, 2026.
WatkinsX Dictionary, s.v. “lux,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/lux.
Source: lux on Wiktionary, CC BY-SA 4.0.