hy·drate (hī'drāt') n. A solid compound containing water molecules combined in a definite ratio as an integral part of the crystal. v.
hy·drat·ed, hy·drat·ing, hy·drates
v.
tr.
To rehydrate.
To supply water to (a person, for example) in order to restore or maintain fluid balance: "Cold water is the fastest and safest way to hydrate an ordinary athlete"(Jane E. Brody).
v.
intr. To become a hydrate. hy·dra'tion n., hy'dra'tor n.