lumière

/lymjɛʁ/
1. General
nounfeminineSing

light; illumination; a source or presence of light (natural or artificial)

Éteins la lumière en partant, s'il te plaît.

Turn off the light when you leave, please.

Synonyms:éclairage, clarté
2. General
nounfeminineSing

clarity, explanation; the act of making something clear (e.g., 'to shed light on' a subject)

Le documentaire a fait la lumière sur cette affaire.

The documentary shed light on that case.

Synonyms:éclaircissement, clarification
3. General
nounfeminineSing

intelligence or cleverness (often used ironically: 'pas une lumière' = not very bright)

Franchement, son nouveau mec, c'est pas une lumière.

Honestly, her new boyfriend isn't exactly the sharpest tool in the shed.

Synonyms:intelligence, esprit