Real Dictionary

crow
countable noun: A crow is a large black bird which makes a loud, harsh noise.
verb: If someone crows, they make happy sounds or say something happily.
verb: If you say that someone is crowing about something they have achieved or are pleased about, you disapprove of them because they keep telling people proudly about it.
verb: When a cock crows, it makes a loud sound, often early in the morning.

Crow in American English
noun: a member of a Siouan people of eastern Montana

crow in American English 1
any of a genus (Corvus) of large, nonmigratory corvids with glossy black plumage and a typical harsh call, including the raven, rook, and jackdaw
noun: any of several large oscine birds of the genus Corvus, of the family Corvidae, having a long, stout bill, lustrous black plumage, and a wedge-shaped tail, as the common C. brachyrhynchos, of North America

crow in American English 2
to make the shrill cry of a rooster

crow in American Englishfor 1 (esp. Brit.) 2
intransitive verb: to utter the characteristic cry of a rooster
noun: the characteristic cry of a rooster

Crow in British English
noun: a member of a Native American people living in E Montana

crow in British English 1
noun: any large gregarious songbird of the genus Corvus, esp C. corone (the carrion crow) of Europe and Asia: family Corvidae. Other species are the raven, rook, and jackdaw and all have a heavy bill, glossy black plumage, and rounded wings

crow in British English 2
to utter a shrill squawking sound, as a cock
noun: the act or an instance of crowing