Entry 5 senses · 4 variants Webster, 1913 Sprag /(sprăg)/ · IPA /spræɡ/ n. n. v. t. a. 01 n. A young salmon. 1. A young salmon.(Zool.) [Prov. Eng.] 02 n. A billet of wood; a piece of timber used as a prop. 1. A billet of wood; a piece of timber used as a prop. 03 v. t. To check the motion of, as a carriage on a steep grade, by putting a sprag between the spokes of the wheel. imp. & p. p. Spragged; p. pr. & vb. n. Spragging 1. To check the motion of, as a carriage on a steep grade, by putting a sprag between the spokes of the wheel. 2. To prop or sustain with a sprag. 04 a. See Sprack, a. 1. See Sprack, a. See: Sprack