flood·light / ˈflədˌlīt/ • n. a large, powerful light, typically one of several used to illuminate a sports field, a stage, or the exterior of a building. ∎ the illumination provided by such a light: a tennis court where you can play by floodlight.• v. (past and past part. -lit) [tr.] [usu. as adj.] (floodlit) illuminate (a building or outdoor area) with such lights: floodlit football fields.