From WordNet (r) 3.0 (2006) [wn]:
monster
n 1: an imaginary creature usually having various human and
animal parts
2: someone or something that is abnormally large and powerful
[syn: giant, goliath, behemoth, monster, colossus]
3: a person or animal that is markedly unusual or deformed [syn:
freak, monster, monstrosity, lusus naturae]
4: a cruel wicked and inhuman person [syn: monster, fiend,
devil, demon, ogre]
5: (medicine) a grossly malformed and usually nonviable fetus
[syn: monster, teras]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Monster \Mon"ster\ (m[o^]n*st[~e]r), n. [OE. monstre, F.
monstre, fr. L. monstrum, orig., a divine omen, indicating
misfortune; akin of monstrare to show, point out, indicate,
and monere to warn. See Monition, and cf. Demonstrate,
Muster.]
1. Something of unnatural size, shape, or quality; a prodigy;
an enormity; a marvel.
[1913 Webster]
A monster or marvel. --Chaucer.
[1913 Webster]
2. Specifically, an animal or plant departing greatly from
the usual type, as by having too many limbs.
[1913 Webster]
3. Any thing or person of unnatural or excessive ugliness,
deformity, wickedness, or cruelty.
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From The Collaborative International Dictionary of English v.0.48 [gcide]:
Monster \Mon"ster\, a.
1. Monstrous in size. --Pope.
[1913 Webster]
2. Enormous or very powerful; as, he drove a monster Harley.
[informal]
[PJC]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Monster \Mon"ster\, v. t.
To make monstrous. [Obs.] --Shak.
[1913 Webster]