(n.) The uppermost cover of a bed or of any piece of furniture.
Example Sentences:
(1) He was found dead under a heavy 'futon', a coverlet, which covered the whole of his body.
(2) On a winter day, a 52-day-old female baby was placed under a Japanese electric foot warmer with a coverlet (kotatsu) on an electric carpet warmer in a heated room at home.