drop cloth dropc·loth uncommon noun 1. a curtain that can be lowered and raised onto a stage from the flies; often used as background scenery Synonymsdrop curtaindrop clothdrop 2. a large piece of cloth laid over the floor or furniture while a room is being painted Synonymsdrop cloth Related words Word family drop Broader terms piece of clothcurtain WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.