1. Soft, and full of cavities; of an open, loose, pliable texture; as, a spongy excrescence; spongy earth; spongy cake; spongy bones.
2. Wet; drenched; soaked and soft, like sponge; rainy. Spongy April.
3. Having the quality of imbibing fluids, like a sponge.
(Science: chemistry) Spongy lead, sponge lead. See Sponge. Spongy platinum. See Platinum.