a large fish with silver skin and pink flesh that is used for food. Salmon live in the sea but swim up rivers to lay their eggs. a whole salmon smoked salmon wild and farmed salmon Scotland’s wild salmon population is in danger of being overwhelmed by the farmed variety. See related entries: Fish Word Origin Middle English samoun, from Anglo-Norman French saumoun, from Latin salmo, salmon-. The spelling with -l- is influenced by Latin.