(1):

(a.) Wet; drenched; soaked and soft, like sponge; rainy.

(2):

(a.) Soft, and full of cavities; of an open, loose, pliable texture; as, a spongy excrescence; spongy earth; spongy cake; spongy bones.

(3):

(a.) Having the quality of imbibing fluids, like a sponge.