Definition of grilse in English:



  • A salmon that has returned to fresh water after a single winter at sea.

    • ‘The first grilse of the season was also caught during this period.’
    • ‘A good amount of rain is forecast for the coming days which should bring the grilse in from the bay.’
    • ‘Four grilse were caught at Durkanís Pool, one of 5 lb by a German angler and the rest higher up the river.’
    • ‘The sort of rod that you'd use for sea trout or grilse should suffice.’
    • ‘The grilse are still here in very good numbers, and the fishing prospects for the week ahead are excellent.’


Late Middle English: of unknown origin.