Shockingly hideous or frightful in appearance.adjective
Of or resembling a fabulous monster.adjective
Exceptionally large; enormous.adjective
Extremely immoral or cruel.adjective
Deviating greatly from the norm in appearance or structure; abnormal.
Exceedingly; extremely; wonderfully: as, monstrous difficult.
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.