1. sprag - Noun
2. sprag - Adjective
3. sprag - Verb
A young salmon.
A billet of wood; a piece of timber used as a prop.
To check the motion of, as a carriage on a steep grade, by putting a sprag between the spokes of the wheel.
To prop or sustain with a sprag.
See Sprack, a.
Source: Webster's dictionary