English dictionary, thesaurus, translations & etymology
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noun

monster

MONS-tuh
noun
1
A frightening, dangerous creature, often imaginary or mythical.
"The children swore a monster lived under the bed."
"In the film, the monster terrorized the small coastal town."
2
A cruel, heartless person, especially one who commits terrible acts.
"The press branded the killer a monster."
adj
1
Extremely large or impressive.
"They scored a monster hit with their debut single."

How to Use Monster

Learner’s notes

In plain EnglishA terrifying creature — or, more loosely, either a cruel person or something unusually huge.

Common pairings
a scary monster a monster hit act like a monster

Word Forms

monstered past tense, monsters plural, monsters singular

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The children swore a _____ lived under the bed.

Etymology

From Old French monstre, from Latin monstrum — originally something viewed as an omen or warning sign, later "a freakish creature."

Definitions: FreeDict original editorial