Source : Webster's Revised Unabridged Dictionary (1913)

Cow \Cow\, n.; pl. {Cows} (kouz); old pl. {Kine} (k[imac]n).
   [OE. cu, cou, AS. c[=u]; akin to D. koe, G. kuh, OHG. kuo,
   Icel. k[=y]r, Dan. & Sw. ko, L. bos ox, cow, Gr. boy^s, Skr.
   g[=o]. [root]223. Cf. {Beef}, {Bovine}, {Bucolic}, {Butter},
   {Nylghau}.]
   1. The mature female of bovine animals.

   2. The female of certain large mammals, as whales, seals,
      etc.

Source : WordNet®

cows
     n : domesticated bovine animals as a group regardless of sex or
         age; "so many head of cattle"; "wait till the cows come
         home"; "seven thin and ill-favored kine"- Bible; "a team
         of oxen" [syn: {cattle}, {kine}, {oxen}, {Bos taurus}]