Source : Webster's Revised Unabridged Dictionary (1913)

Widow \Wid"ow\, n. [OE. widewe, widwe, AS. weoduwe, widuwe,
   wuduwe; akin to OFries. widwe, OS. widowa, D. weduwe, G.
   wittwe, witwe, OHG. wituwa, witawa, Goth. widuw?, Russ.
   udova, OIr. fedb, W. gweddw, L. vidua, Skr. vidhav[=a]; and
   probably to Skr. vidh to be empty, to lack; cf. Gr. ? a
   bachelor. ????. Cf. {Vidual}.]
   A woman who has lost her husband by death, and has not
   married again; one living bereaved of a husband. ``A poor
   widow.'' --Chaucer.

   {Grass widow}. See under {Grass}.

   {Widow bewitched}, a woman separated from her husband; a
      grass widow. [Colloq.]

   {Widow-in-mourning} (Zo["o]l.), the macavahu.

   {Widow monkey} (Zo["o]l.), a small South American monkey
      ({Callithrix lugens}); -- so called on account of its
      color, which is black except the dull whitish arms, neck,
      and face, and a ring of pure white around the face.

   {Widow's chamber} (Eng. Law), in London, the apparel and
      furniture of the bedchamber of the widow of a freeman, to
      which she was formerly entitled.

Widow \Wid"ow\, a.
   Widowed. ``A widow woman.'' --1 Kings xvii. 9. ``This widow
   lady.'' --Shak.

Widow \Wid"ow\, v. t. [imp. & p. p. {Widowed}; p. pr. & vb. n.
   {Widowing}.]
   1. To reduce to the condition of a widow; to bereave of a
      husband; -- rarely used except in the past participle.

            Though in thus city he Hath widowed and unchilded
            many a one, Which to this hour bewail the injury.
                                                  --Shak.

   2. To deprive of one who is loved; to strip of anything
      beloved or highly esteemed; to make desolate or bare; to
      bereave.

            The widowed isle, in mourning, Dries up her tears.
                                                  --Dryden.

            Tress of their shriveled fruits Are widowed, dreary
            storms o'er all prevail.              --J. Philips.

            Mourn, widowed queen; forgotten Sion, mourn.
                                                  --Heber.

   3. To endow with a widow's right. [R.] --Shak.

   4. To become, or survive as, the widow of. [Obs.]

            Let me be married to three kings in a forenoon, and
            widow them all.                       --Shak.

Widow \Wid"ow\, n. (Card Playing)
   In various games, any extra hand or part of a hand, as one
   dealt to the table.

Source : WordNet®

widow
     v : cause to be without a spouse; "The war widowed many women in
         the former Yugoslavia"

widow
     n : a woman whose husband is dead especially one who has not
         remarried [syn: {widow woman}]