1.especially British EnglishBrEDHH a small windowabove a door or a larger window 〔门或大窗上方的〕楣窗,气窗SYN American English transom
2.American EnglishAmEDHH a window shaped like a half-circle 扇形窗
Examples from the Corpus
fanlight• All the doors have fanlights even though they are in the basement.• Robert would not have said that the fanlight was almost obliterated with birddroppings.• Dustfloated in the beams of light that flooded through the fanlight over the front door.• Well, it's not entirely dark ... there's a lamp outside that shines through the fanlight.• It looked as if it had only two storeys, but suggested an attic under the fanlight in the roof.• She stood directly under the fanlight in the middle of the room.• It was small but typically eighteenth-century in origin, with an Adam doorway and spiderwebfanlight.