monstrous

[ mon-struhs ]
/ ˈmɒn strəs /

adjective

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.

adverb

extremely; exceedingly; very.

Origin of monstrous

First recorded in 1350–1400; Middle English word from Latin word mōnstrōsus. See monster, -ous

OTHER WORDS FROM monstrous

mon·strous·ly, adverb mon·strous·ness, noun

Example sentences from the Web for monstrous

British Dictionary definitions for monstrous

monstrous
/ (ˈmɒnstrəs) /

adjective

abnormal, hideous, or unnatural in size, character, etc
(of plants and animals) abnormal in structure
outrageous, atrocious, or shocking it is monstrous how badly he is treated
huge a monstrous fire
of, relating to, or resembling a monster

Derived forms of monstrous

monstrously, adverb monstrousness, noun