1. (n.) A compound formed by the union of water with some other substance, generally forming a neutral body, as certain crystallized salts.

2. (n.) A substance which does not contain water as such, but has its constituents (hydrogen, oxygen, hydroxyl) so arranged that water may be eliminated; hence, a derivative of, or compound with, hydroxyl; hydroxide; as, ethyl hydrate, or common alcohol; calcium hydrate, or slaked lime.

3. (v. t.) To form into a hydrate; to combine with water.

acetify acidify acidulate alkalify alkalize borate carbonate catalyze chemical chlorinate electrolyze ferment homopolymerize hydrogenate hydroxylate isomerize nitrate oxidize pepsinate peroxidize phosphatize polymerize reduce sulfate sulfatize sulfonate work