4. (Geol.) A wall-like mass of mineral matter, usually an intrusion of igneous rocks, filling up rents or fissures in the original strata.
Dike, v. t. [imp. & p. p. Diked (?); p. pr. & vb. n. Diking.] [OE. diken, dichen, AS. dcian to dike. See Dike.] 1. To surround or protect with a dike or dry bank; to secure with a bank.