Source : Webster's Revised Unabridged Dictionary (1913)

Cuckold \Cuck"old\ (k?k"?ld), n. [OE. kukeweld, cokewold,
   cokold, fr. OF. coucoul, cucuault, the last syllable being
   modified by the OE. suffix -wold (see {Herald}); cf. F. cocu
   a cuckold, formerly also, a cuckoo, and L. cuculus a cuckoo.
   The word alludes to the habit of the female cuckoo, who lays
   her eggs in the nests of other birds, to be hatched by them.]
   1. A man whose wife is unfaithful; the husband of an
      adulteress. --Shak.

   2. (Zo["o]l.)
      (a) A West Indian plectognath fish ({Ostracion
          triqueter}).
      (b) The cowfish.

Cuckold \Cuck"old\, v. t. [imp. & p. p. {Cuckolded}; p. pr. &
   vb. n. {Cuckolding}.]
   To make a cuckold of, as a husband, by seducing his wife, or
   by her becoming an adulteress. --Shak.

Source : WordNet®

cuckold
     n : a man whose wife committed adultery
     v : be sexually unfaithful to one's partner in marriage; "She
         cheats on her husband"; "Might her husband be wandering?"
         [syn: {cheat on}, {cheat}, {betray}, {wander}]