Wikipedia:

Cock

Summary:

may refer to: (in the Cockney dialect) a male. | the male of most species of bird, but especially A Cock or Rooster, the male of the domestic fowl or chicken, Gallus domesticus, often used in the past for cock-fighting. Hence its use for | The ...  (44 of 429 words, 24 senses)

Link:

http://en.wikipedia.org/wiki/Cock  [cite]

Random House:

cock | stopcock [sense-specific]

Summary:

a male chicken; rooster. | the male of any bird, especially of the gallinaceous kind. | a hand-operated valve or faucet, especially one opened or ...  (23 of 322 words, 23 senses, pronunciation)

Link:

http://dictionary.infoplease.com/cock  [cite]

Wiktionary:

cock | cocks [plural] | cocked [past tense] | cocking [present participle] | cockbird | rooster | stopcock | penis | cock-a-hoop | cock-a-leekie | cockcrow | cockchafer | cocker | cocker spaniel | cockeyed | cockfight | cockfighting | cockloft | cockpit | cocksure | cocktease | cockteaser | fighting cock | gamecock | uncockable | weathercock | woodcock | cock one's ear | hay-cock

Summary:

A male bird, especially a domestic fowl. | Male chicken or other gallinaceous bird. | A valve or tap for controlling flow in plumbing. | The hammer of a firearm trigger mechanism. | [slang, obscene] The penis. | [curling] The circle at the end of the ...  (41 of 262 words, 18 senses, 3 etymologies, pronunciation)

Link:

http://en.wiktionary.org/wiki/cock  [cite]

Encarta:

cock | cocks [plural] | cocked [past tense] | cocking [present participle]

Summary:

an adult male of a domestic fowl, usually only kept for breeding. Cocks have a distinctive crowing call. | the adult male of a bird | the hammer of a ...  (28 of 252 words, 11 senses, 1 etymology, pronunciation)

Link:

http://encarta.msn.com/dictionary 1861598241/definition.html  [cite]

Merriam-Webster:

cock | cock of the walk

Summary:

the adult male of the domestic chicken (Gallus gallus) | the male of birds other than the domestic chicken | "woodcock" | archaic; the crowing of a ...  (24 of 136 words, 12 senses, 1 etymology, pronunciation)

Link:

http://www.merriam-webster.com/dictionary/cock  [cite]

Columbia:

bird

Summary:

warm-blooded, egg-laying, vertebrate animal having its body covered with feathers and its forelimbs modified into wings, which are used by most birds ...  (22 of 279 words)

Link:

http://www.infoplease.com/ce6/sci/A0807642.html  [cite]

Britannica:

bird | Aves [class]

Summary:

Any of the warm-blooded, beaked vertebrates of the class Aves, including more than 9,600 living species. A covering of feathers distinguishes birds ...  (22 of 100 words)

Link:

http://www.britannica.com/EBchecked/topic/66391/bird  [cite]