[syn: predaceous, predacious, predatory]
The Collaborative International Dictionary of English v.0.48:
Predatory \Pred"a*to*ry\, a. [L. praedatorius, fr. praedari to
   plunder, fr. praeda prey. See Prey.]
   1. Characterized by plundering; practicing rapine;
      plundering; pillaging; as, a predatory excursion; a
      predatory party. "A predatory war." --Macaulay.
      [1913 Webster]
   2. Hungry; ravenous; as, predatory spirits. [Obs.]
      [1913 Webster]
            Exercise . . . maketh the spirits more hot and
            predatory.                            --Bacon.
      [1913 Webster]
   3. (Zool.) Living by preying upon other animals; carnivorous.
      [1913 Webster]
WordNet (r) 3.0 (2006):
predatory
    adj 1: characterized by plundering or pillaging or marauding;
           "bands of marauding Indians"; "predatory warfare"; "a
           raiding party" [syn: marauding, predatory, raiding]
    2: living by preying on other animals especially by catching
       living prey; "a predatory bird"; "the rapacious wolf";
       "raptorial birds"; "ravening wolves"; "a vulturine taste for
       offal" [syn: predatory, rapacious, raptorial,
       ravening, vulturine, vulturous]
    3: living by or given to victimizing others for personal gain;
       "predatory capitalists"; "a predatory, insensate society in
       which innocence and decency can prove fatal"- Peter S.
       Prescott; "a predacious kind of animal--the early geological
       gangster"- W.E.Swinton [syn: predaceous, predacious,
       predatory]
Moby Thesaurus II by Grady Ward, 1.0:
33 Moby Thesaurus words for "predatory":
   all-devouring, all-engulfing, avaricious, bloodsucking,
   carnivorous, despoiling, extortionate, grabby, grasping, greedy,
   larcenous, looting, lupine, marauding, parasitic, pillaging,
   plundering, plunderous, predacious, rapacious, raptorial, ravaging,
   ravening, ravenous, robbing, sharkish, spoliatory, thieving,
   usurious, voracious, vulturine, vulturous, wolfish