The definition of a cow is the female of domestic cattle and certain other mammals including whales, manatees and elephants.(noun)
See cow in Webster's New World College Dictionary
Origin: ME cou, cow, pl. kye (southern doubled pl. kyn) < OE cū, pl. cy < IE base *gwou-, cow, ox > Sans gauḥ, Gr bous, L bos, OIr bo, Ger kuh
Origin: < ON kūga, to subdue; meaning infl. by cow, coward
See cow in American Heritage Dictionary 4
Origin: Middle English cou
Origin: , from Old English cū; see gwou- in Indo-European roots.
transitive verb cowed, cow·ing, cows
Origin: Probably of Scandinavian origin.
Learn more about cow