a piece of light natural or artificial material that becomes soft when it is wet, is able to take in and hold liquid, and is used for washing or cleaning —sometimes used figuratively
a type of sea animal from which natural sponges are made
sponge cake
2spongeverb
to clean or wipe (something) with a sponge
to put (paint) on a surface with a sponge
to get money, food, etc., from (someone) without doing or paying anything in return —often + off