nounpl. or grils′es
a young salmon on its first return from the sea to fresh water
Origin of grilseMiddle English grills, probably metathesis of Old French gisle, diminutive from gris, gray: see grisaille
A young Atlantic salmon on its first return from the sea to fresh or brackish waters.
Origin of grilseFrom Middle English grills young salmon (pl.)
- A young salmon after its first return from the sea.