Frĭth1, n.
n. [Scot. firth, Dan. & Norw. fiord, Sw. fjärd, Eng. also fret. See FIRTH, FIORD, FRET.] 1. A narrow arm of the sea; an estuary; the opening of a river into the sea; as, the frith of Forth, or of Clyde. 2. A kind of weir for catching fish. Carver.