mon·ster
ˈmän(t)-stər 
plural monsters
1
a
: an animal of strange or terrifying shape
a mythical monster
a sea monster
… visualize this scaleless monster, eight or nine feet long, sprawling in the shade by the side of the mud pools …—
W. E. Swinton
b
: one unusually large for its kind
That truck is a monster.
That's why I was born in my grandmother's house—a grand, brick Federal monster of a house.—John Irving
2
a
: an animal or plant of abnormal form or structure
b
: one who deviates from normal or acceptable behavior or character
an immoral monster
3
: a threatening force
the same monster—Destiny … that rolls every civilization to doom—W. L. Sullivan
4
: something monstrous
especially
: a person of unnatural or extreme ugliness, deformity, wickedness, or cruelty
a cruel monster of a father
5
: one that is highly successful
That movie was a monster at the box office.
: enormous or impressive especially in size, extent, or numbers
Examples of monster in a Sentence
Noun
That car is a monster.
Inflation has become an economic monster.
Adjective
The movie turned out to be a monster hit.
Recent Examples on the Web
Ron Estes, MSNBC Newsweek, 31 Mar. 2025
White Painted Woman was a model of heroism and honorable womanhood: When evil monsters were hunting the Apache people, the White Painted Woman gave birth to a son who would destroy the creatures to help make Earth inhabitable for humanity.
—Alejandra Rubio, NPR, 29 Mar. 2025
Julia Gomez, USA TODAY, 21 Mar. 2025
Leveraged and inverse ETFs give investors the opportunity to make monster bets on the stock market’s direction.
—Krysta Escobar, CNBC, 27 Feb. 2025
See All Example Sentences for monster
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Noun
The first major update, aptly titled Title Update 1, is set to be released later this week, and brings new monsters, new activities, and more for players of the game.
—Adjective
Well, that's what some people are doing for this monster doll from China called Labubu.
—Cite this Entry
“Monster.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/monster. Accessed 8 Apr. 2025.
Kids Definition
monster
1 of 2 noun
mon·ster
ˈmän(t)-stər
1
: an animal or plant of abnormal form or structure
2
: a strange or horrible creature
3
: something unusually large
4
: an extremely wicked or cruel person
monster
2 of 2 adjective
: very large : enormous
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