Source : Webster's Revised Unabridged Dictionary (1913)

Overcome \O`ver*come"\, v. t. [imp. {Overcame}; p. p.
   {Overcome}; p. pr & vb. n. {Overcoming}.] [AS. ofercuman. See
   {Over}, {Come}, and cf. {Supervene}.]
   1. To get the better of; to surmount; to conquer; to subdue;
      as, to overcome enemies in battle.

            This wretched woman overcome Of anguish, rather than
            of crime, hath been.                  --Spenser.

   2. To overflow; to surcharge. [Obs.] --J. Philips.

   3. To come or pass over; to spreads over. [Obs.]

            And overcome us like a summer's cloud. --Shak.

   Syn: To conquer; subdue; vanquish; overpower; overthrow;
        overturn; defeat; crush; overbear; overwhelm; prostrate;
        beat; surmount. See {Conquer}.

Overcome \O`ver*come"\, v. t. [imp. {Overcame}; p. p.
   {Overcome}; p. pr & vb. n. {Overcoming}.] [AS. ofercuman. See
   {Over}, {Come}, and cf. {Supervene}.]
   1. To get the better of; to surmount; to conquer; to subdue;
      as, to overcome enemies in battle.

            This wretched woman overcome Of anguish, rather than
            of crime, hath been.                  --Spenser.

   2. To overflow; to surcharge. [Obs.] --J. Philips.

   3. To come or pass over; to spreads over. [Obs.]

            And overcome us like a summer's cloud. --Shak.

   Syn: To conquer; subdue; vanquish; overpower; overthrow;
        overturn; defeat; crush; overbear; overwhelm; prostrate;
        beat; surmount. See {Conquer}.

Overcome \O`ver*come"\, v. i.
   To gain the superiority; to be victorious. --Rev. iii. 21.

Source : WordNet®

overcome
     adj : rendered powerless especially by an excessive amount or
           profusion of something; "a desk flooded with
           applications"; "felt inundated with work"; "too much
           overcome to notice"; "a man engulfed by fear"; "swamped
           by work" [syn: {flooded}, {inundated}, {overpowered}, {overwhelmed},
            {swamped}, {engulfed}]
     [also: {overcame}]

overcome
     v 1: win a victory over; "You must overcome all difficulties";
          "defeat your enemies"; "He overcame his shyness"; "She
          conquered here fear of mice"; "He overcame his
          infirmity"; "Her anger got the better of her and she
          blew up" [syn: {get the better of}, {defeat}]
     2: get on top of; deal with successfully; "He overcame his
        shyness" [syn: {get over}, {subdue}, {surmount}, {master}]
     3: overcome, as with emotions or perceptual stimuli [syn: {overwhelm},
         {overpower}, {sweep over}, {whelm}, {overtake}]
     4: overcome, usually through no fault or weakness of the person
        that is overcome; "Heart disease can get the best of us"
        [syn: {get the best}, {have the best}]
     [also: {overcame}]