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n. pl. grouse or grous·es
Any of various plump, chiefly ground-dwelling gallinaceous birds of the subfamily Tetraoninae of northern North America and Eurasia, characteristically having feathered legs and nostrils and mottled plumage.
grouse 2(grous) Informal
intr.v. groused, grous·ing, grous·es
To complain; grumble.
A cause for complaint.
[Perhaps from French dialectal groucer, from Old French grouchier; see grudge.]