| firth | (n) English linguist who contributed to linguistic semantics and to prosodic phonology and who was noted for his insistence on studying both sound and meaning in context (1890-1960), Syn. John Rupert Firth, J. R. Firth |
| firth | (n) a long narrow estuary (especially in Scotland) |
| firth of clyde | (n) a firth on the southwestern coast of Scotland emptying into the North Channel |
| firth of forth | (n) a large firth on the east coast of Scotland and the estuary of the Forth River; location of Edinburgh |
| moray firth | (n) an inlet of the North Sea on the northeast coast of Scotland |
| solway firth | (n) a large firth on the west coast of Britain between England and Scotland |
