Noun monster has 5 senses
  1. monster - an imaginary creature usually having various human and animal parts
    --1 is a kind of
    imaginary being, imaginary creature
    --1 has particulars:
     bogeyman, bugbear, bugaboo, boogeyman, booger; mythical monster, mythical creature
  2. giant, goliath, behemoth, monster, colossus - someone or something that is abnormally large and powerful
    --2 is a kind of anomaly, unusual person
  3. freak, monster, monstrosity, lusus naturae - a person or animal that is markedly unusual or deformed
    --3 is a kind of mutant, mutation, variation, sport
    --3 has particulars: leviathan
  4. monster, fiend, devil, demon, ogre - a cruel wicked and inhuman person
    --4 is a kind of unpleasant person, disagreeable person
    --4 has particulars: demoniac
  5. monster, teras - (medicine) a grossly malformed and usually nonviable fetus
    --5 is a kind of fetus, foetus
    --5 has parts: acardia; acephalia, acephaly, acephalism