Sponge meaning : Any of various marine invertebrates, mostly of the phylum Porifera, that have a porous skeleton often of silica. A piece of porous material used for washing (originally made from the invertebrates, now often made of plastic). A porous material such as sponges consist of. A heavy drinker. A type of light cake. A type of steamed pudding. A person who takes advantage of the generosity of others (abstractly imagined to absorb or soak up the money or efforts of others like a sponge). A form of contraception that is inserted vaginally; a contraceptive sponge. Any sponge-like substance. A mop for cleaning the bore of a cannon after a discharge. It consists of a cylinder of wood, covered with sheepskin with the wool on, or cloth with a heavy looped nap, and having a handle, or staff. The extremity, or point, of a horseshoe, corresponding to the heel. A nuclear power plant worker routinely exposed to radiation. To take advantage of the kindness of others. To get by imposition; to scrounge. To deprive (somebody) of something by imposition. To clean, soak up, or dab with a sponge. To suck in, or imbibe, like a sponge. To wipe out with a sponge, as letters or writing; to efface; to destroy all trace of. To be converted, as dough, into a light, spongy mass by the agency of yeast or leaven.