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
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
John Irving2
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
W. L. Sullivan4
: 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
Synonyms
Noun
Adjective
- astronomical
- astronomic
- Brobdingnagian
- bumper
- colossal
- cosmic
- cosmical
- cyclopean
- elephantine
- enormous
- galactic
- gargantuan
- giant
- gigantesque
- gigantic
- grand
- herculean
- heroic
- heroical
- Himalayan
- huge
- humongous
- humungous
- immense
- jumbo
- king-size
- king-sized
- leviathan
- mammoth
- massive
- mega
- mighty
- monstrous
- monumental
- mountainous
- oceanic
- pharaonic
- planetary
- prodigious
- super
- super-duper
- supersize
- supersized
- titanic
- tremendous
- vast
- vasty
- walloping
- whacking
- whopping
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
Mike Stubbs, Forbes, 3 Jan. 2025
The major averages fizzled at the finish line last year, following a monster performance.
—Sarah Min, CNBC, 2 Jan. 2025
Dana Rose Falcone, People.com, 6 Jan. 2025
Weston, who already has 39 IGFA world records, teamed up with local fishing legend Nolan Spengler (who broke the Minnesota muskie record in 2021) to pursue monster muskies and potentially take the all-tackle length record.
—Alice Jones Webb, Outdoor Life, 1 Jan. 2025
See all Example Sentences for monster 
Examples are automatically compiled from online sources to
show current usage.
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Noun
This year there’s a new monster in the form of Atakhan, who does look quite cool, some changes to the early game objectives and some new boot upgrades, but that’s pretty much it.
—Mike Stubbs, Forbes, 3 Jan. 2025
The major averages fizzled at the finish line last year, following a monster performance.
—Sarah Min, CNBC, 2 Jan. 2025
Adjective
Cooper Koch found monster success thanks to his latest project.
—Dana Rose Falcone, People.com, 6 Jan. 2025
Weston, who already has 39 IGFA world records, teamed up with local fishing legend Nolan Spengler (who broke the Minnesota muskie record in 2021) to pursue monster muskies and potentially take the all-tackle length record.
—Alice Jones Webb, Outdoor Life, 1 Jan. 2025
See all Example Sentences for monster
Dictionary Entries Near monster
Cite this Entry
“Monster.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/monster. Accessed 18 Jan. 2025.
Copy CitationKids 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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