Monster Definition

mŏnstər

monsters

noun

monsters

Any plant or animal of abnormal shape or structure, as one greatly malformed or lacking some parts; monstrosity.

Webster's New World

Any imaginary or fictional creature regarded as unnatural, repulsive, terrifying, etc.

Webster's New World

Something monstrous.

Webster's New World

An organism that has structural defects or deformities.

American Heritage

A person so cruel, wicked, depraved, etc. as to horrify others.

Webster's New World

Synonyms:

adjective

Huge; enormous.

Webster's New World

Extremely large; monstrous.

A monster hit at the box office; ate a monster steak.

American Heritage

Synonyms:

verb

To make into a monster; to categorise as a monster; to demonise.

Wiktionary

To behave as a monster to; to terrorise.

Wiktionary

(chiefly Australia) To harass.

Wiktionary

Other Word Forms of Monster

Singular:

monster

Plural:

monsters

Middle English monstre from Old French from Latin mōnstrum portent, monster from monēre to warn men-¹ in Indo-European roots

From American Heritage Dictionary of the English Language, 5th Edition
From Middle English and Middle French monstre, itself from Latin monstrum.

From Wiktionary