loofah n 1: the dried fibrous part of the fruit of a plant of the genus Luffa; used as a washing sponge or strainer [syn: {loofa}, {loofah}, {luffa}, {loufah sponge}] 2: the loofah climber that has cylindrical fruit [syn: {loofah}, {vegetable sponge}, {Luffa cylindrica}]