| sponge | primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework |
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| sponge | a follower who hangs around a host (without benefit to the host) in hope of gain or advantage |
| sponge | a porous mass of interlacing fibers the forms the internal skeleton of various marine animals and usable to absorb water or any porous rubber or cellulose product similarly used |
| sponge | gather sponges, in the ocean |
| sponge | wipe with a sponge, so as to clean or moisten |
| sponge | soak up with a sponge |
| sponge | erase with a sponge |
| sponge | ask for and get free |
| sponge | (British) a waterproof bag for holding bathrooms items (soap and toothpaste etc.) when you are travelling |
| sponge | you wash your body with a sponge or washcloth instead of in a bathtub |
| sponge | a light porous cake made with eggs and flour and sugar without shortening |
| sponge | any soft porous fabric (especially in a loose honeycomb weave) |