| n. 1.  a.  An imaginary or legendary creature, such as a centaur or Harpy, that combines parts from various animal or human forms. b.  A creature having a strange or frightening appearance. 2.  Archaic   An organism that has structural defects or deformities. 3.  Informal   A very large animal, plant, or object. 4.  One who inspires horror or disgust: a monster of selfishness. adj.  Informal   Extremely large; monstrous: a monster hit at the box office; ate a monster steak. [Middle English monstre, from Old French, from Latin mōnstrum, portent, monster, from monēre, to warn; see  men-1 in the Appendix of Indo-European roots.] | 
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