from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Shockingly hideous or frightful.
  • adj. Exceptionally large; enormous: a monstrous tidal wave.
  • adj. Deviating greatly from the norm in appearance or structure; abnormal.
  • adj. Of or resembling a fabulous monster.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. hideous or frightful
  • adj. enormously large
  • adj. freakish or grotesque
  • adj. of, or relating to a mythical monster

from the GNU version of the Collaborative International Dictionary of English

  • adj. Marvelous; strange.
  • adj. Having the qualities of a monster; deviating greatly from the natural form or character; abnormal.
  • adj. Extraordinary in a way to excite wonder, dislike, apprehension, etc.; -- said of size, appearance, color, sound, etc.
  • adj. Extraordinary on account of ugliness, viciousness, or wickedness; hateful; horrible; dreadful.
  • adj. Abounding in monsters.
  • adv. Exceedingly; very; very much.

from The Century Dictionary and Cyclopedia

  • Of unnatural formation; deviating greatly from the natural form or structure; out of the common course of nature: as, a monstrous birth or production.
  • Enormous; huge; prodigious; unparalleled.
  • Shocking; hateful; horrible: as, a monstrous delusion.
  • Full of monsters or strange creatures.
  • Synonyms Abnormal.
  • Prodigious, vast, colossal, stupendous.
  • Wicked, Atrocious, etc. (see atrocious).
  • Exceedingly; extremely; wonderfully: as, monstrous difficult.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. shockingly brutal or cruel
  • adj. abnormally large
  • adj. distorted and unnatural in shape or size; abnormal and hideous


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English, from Old French monstruos, from Latin mōnstruōsus, from mōnstrum, portent, monster; see monster.


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