frightful or hideous, especially in appearance; extremely ugly.
shocking or revolting; outrageous: monstrous cruelty.
extraordinarily great; huge; immense: a monstrous building.
deviating grotesquely from the natural or normal form or type.
having the nature or appearance of a fabulous monster.


extremely; exceedingly; very.

Origin of monstrous

First recorded in 1350–1400; Middle English word from Latin word mōnstrōsus. See monster, -ous
Related formsmon·strous·ly, adverbmon·strous·ness, noun

Synonyms for monstrous

1, 2. horrible, atrocious. 3. See gigantic. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for monstrously

grotesquely, heinously, hideously, badly, brutally, cruelly

Examples from the Web for monstrously

Contemporary Examples of monstrously

  • The back story here is that reporting on the details of competing budget proposals is monstrously boring.

    The Daily Beast logo
    The Gov't's Shutdown Sham

    Howard Kurtz

    March 2, 2011

Historical Examples of monstrously

  • Amy, has it never struck you that somebody is monstrously polite to Mrs General?'

    Little Dorrit

    Charles Dickens

  • Monstrously I was desired to drink to the happiness of the groom.

    Ruggles of Red Gap

    Harry Leon Wilson

  • It planted itself in the centre of the nave and grew there monstrously.

  • He had intended to honour her and she had monstrously dishonoured him.

    Kept in the Dark

    Anthony Trollope

  • Well, you did it well--monstrously well, I will say--for you never flinched an eyelash.

British Dictionary definitions for monstrously



abnormal, hideous, or unnatural in size, character, etc
(of plants and animals) abnormal in structure
outrageous, atrocious, or shockingit is monstrous how badly he is treated
hugea monstrous fire
of, relating to, or resembling a monster
Derived Formsmonstrously, adverbmonstrousness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for monstrously



mid-15c., "unnatural, deviating from the natural order, hideous," from Middle French monstrueux, from Latin monstruosus "strange, unnatural, monstrous," from monstrum (see monster). Meaning "enormous" is from c.1500; that of "outrageously wrong" is from 1570s. Earlier form monstruous (late 14c., from Old French monstruous) was "very common in the 16th c." [OED].

Online Etymology Dictionary, © 2010 Douglas Harper