Source : Webster's Revised Unabridged Dictionary (1913)

Rob \Rob\, v. i.
   To take that which belongs to another, without right or
   permission, esp. by violence.

         I am accursed to rob in that thief's company. --Shak.

Rob \Rob\, n. [F.; cf. Sp. rob, It. rob, robbo, Pg. robe,
   arrobe, Ar. rubb, robb, Per. rub.]
   The inspissated juice of ripe fruit, obtained by evaporation
   of the juice over a fire till it acquires the consistence of
   a sirup. It is sometimes mixed with honey or sugar. [Written
   also {rhob}, and {rohob}.]

Rob \Rob\, v. t. [imp. & p. p. {Robbed}; p. pr. & vb. n.
   {Robbing}.] [OF. rober, of German origin; cf. OHG. roub?n, G.
   rauben, and OHG. roub robbing, booty, G. raub. [root]114. See
   {Reave},and cf. {Robe}.]
   1. To take (something) away from by force; to strip by
      stealing; to plunder; to pillage; to steal from.

            Who would rob a hermit of his weeds, His few books,
            or his beads, or maple dish?          --Milton.

            He that is robbed, not wanting what is stolen, Let
            him not know it, and he's not robbed at all. --Shak.

            To be executed for robbing a church.  --Shak.

   2. (Law) To take the property of (any one) from his person,
      or in his presence, feloniously, and against his will, by
      violence or by putting him in fear.

   3. To deprive of, or withhold from, unjustly or injuriously;
      to defraud; as, to rob one of his rest, or of his good
      name; a tree robs the plants near it of sunlight.

            I never robbed the soldiers of their pay. --Shak.

Source : WordNet®

rob
     v 1: take something away by force or without the consent of the
          owner; "The burglars robbed him of all his money"
     2: rip off; ask an unreasonable price [syn: {overcharge}, {soak},
         {surcharge}, {gazump}, {fleece}, {plume}, {pluck}, {hook}]
        [ant: {undercharge}]
     [also: {robbing}, {robbed}]