A rooster is a male chicken. If your cute baby chick grows up to crow loudly first thing every morning, he's probably a rooster.

The word rooster is an American invention, inspired by the rooster's habit of roosting, or standing up on a perch while sleeping or while on the lookout for danger. In the UK, a rooster is more likely to be called a cock or cockerel. In a flock of birds, the rooster's job is to defend the chickens and their nests from predators and other roosters.

Definitions of rooster

n adult male chicken

a young domestic cock; not older than one year
Type of:
Gallus gallus, chicken
a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl

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