Of a grasping habit or disposition; given to seizing for plunder or the satisfaction of greed, or obtaining wrongfully or by extortion; predatory; extortionate: as, a rapacious usurer; specifically, of animals, subsisting by capture of living prey; raptorial; predaceous: as, rapacious birds or fishes.Of a grasping nature or character; characterized by rapacity; immoderately exacting; extortionate: as, a rapacious disposition; rapacious demands.Synonyms Rapacious, Ravenous, Voracious. Rapacious, literally disposed to seize, may note, as the others do not, a distinctive characteristic of certain classes of animals; the tiger is a rapacious animal, but often not ravenous or voracious. Ravenous implies hunger of an extreme sort, shown in eagerness to eat. Voracious means that one eats or is disposed to eat a great deal, without reference to the degree of hunger: a glutton is voracious. Samuel Johnson tended to be a voracious eater, because in his early life he had often gone hungry till be was ravenous.