| Frith 1. (n.) A narrow arm of the sea; an estuary; the opening of a river into the sea; as, the Frith of Forth. 2. (n.) A kind of weir for catching fish. 3. (n.) A forest; a woody place. 4. (n.) A small field taken out of a common, by inclosing it; an enclosure. Thesaurus Entries arm, armlet, bay, bayou, belt, bight, boca, boscage, bosket, brake, canebrake, ceja, chamisal, chaparral, coppice, copse, copsewood, cove, covert, creek, estuary, euripus, fjord, gulf, gut, harbor, inlet, kyle, loch, motte, mouth, narrow, narrow seas, narrows, natural harbor, reach, road, roads, roadstead, sound, strait, straits, thicket, thickset, underbrush, undergrowth, undershrubs, underwood |