Spalt \Spalt\, v. t. & i. [Cf. OE. spalden. See {Spalt}, a.] To split off; to cleave off, as chips from a piece of timber, with an ax. [Prov. Eng. & Local, U.S.] Spalt \Spalt\, n. [Cf. G. spaltstein, from spalten to split. See 1st {Spell}.] (Metal.) Spelter. [Colloq.] Spalt \Spalt\, a. [See 1st {Spell}.] 1. Liable to break or split; brittle; as, spalt timber. [Prov. Eng.] --Halliwell. 2. Heedless; clumsy; pert; saucy. [Prov. Eng.]