1. (verb)light, illume, illumine, light up, illuminate makelighter or brighter
"This lamp lightens the room a bit"
2. (verb)clear, clear up, shed light on, crystallize, crystallise, crystalize, crystalise, straighten out, sort out, enlighten, illuminate, elucidate makefree from confusion or ambiguity; makeclear "Could you clarify these remarks?"; "Clear up the question of who is at fault"
3. (verb)illuminate add embellishments and paintings to (medieval manuscripts)