Definition of cock
1 a
:the adult male of the domestic chicken (Gallus gallus) :rooster
b
:the male of birds other than the domestic chicken
c
:woodcock
e
:weathercock
2
:a device (such as a faucet or valve) for regulating the flow of a liquid
- the cock of an automobile radiator
3 a
:a chief person :leader
b
:a person of spirit and often of a certain swagger or arrogance
4 a
:the hammer in the lock of a firearm
b
:the cocked position of the hammer
—
cock of the walk
:one that dominates a group or situation especially overbearingly
- He was strutting around like the cock of the walk after he got a promotion.
