adj · name · noun · verb · 21 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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Received-Pronunciation:/ˈmɒnstə(ɹ)/
US:mŏn'stər
US:/ˈmɑnstɚ/
Australia:Recorded audio is listed in the source snapshot.
rhymes with -ɒnstə(ɹ)
CMU ARPABET:M AA1 N S T ER0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Very large; worthy of a monster.
Definition source: English Wiktionary via Wiktextract
Usage: informal, not-comparable
Examples
He has a monster appetite.
Meaning relationships
Synonyms: monstrous, gigantic
Antonyms: none provided
2
adj
Meaning 2
Great; very good; excellent.
Definition source: English Wiktionary via Wiktextract
Usage: informal, not-comparable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
name
Meaning 3
A surname.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
A terrifying and dangerous creature, especially one of an imaginary or fictional kind.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: beast
Antonyms: none provided
5
noun
Meaning 5
A terrifying and dangerous creature, especially one of an imaginary or fictional kind.
A cruel, heartless, or antisocial person, especially a criminal.
Definition source: English Wiktionary via Wiktextract
Examples
Get away from those children, you monster!
Meaning relationships
Synonyms: beast
Antonyms: none provided
6
noun
Meaning 6
A terrifying and dangerous creature, especially one of an imaginary or fictional kind.
A badly behaved person, especially a child; a brat.
Definition source: English Wiktionary via Wiktextract
Usage: figuratively, humorous
Examples
Sit still, you little monster!
The rest of the day he heard the children playing kick-the-can, hide-and-seek, Over-Annie-Over, jacks, tops, mibs, and the sound of the little monsters in every shrub and shadow would not let him rest.
Meaning relationships
Synonyms: beast
Antonyms: none provided
7
noun
Meaning 7
A terrifying and dangerous creature, especially one of an imaginary or fictional kind.
A prodigy; someone very talented in a specific domain.
Definition source: English Wiktionary via Wiktextract
Usage: informal
Examples
That dude playing guitar is a monster.
Meaning relationships
Synonyms: beast
Antonyms: none provided
8
noun
Meaning 8
A creature of unnatural or highly unusual shape or form (which makes a frightening or unpleasant impression).
Something very or unusually large.
Definition source: English Wiktionary via Wiktextract
Usage: informal
Examples
Have you seen those powerlifters on TV? They're monsters.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
9
noun
Meaning 9
A creature of unnatural or highly unusual shape or form (which makes a frightening or unpleasant impression).
A deformed animal or person (especially, a severely deformed one); in previous centuries often taken as an ill omen at the time of its birth. (Offensive when applied to humans in modern usage.)
Definition source: English Wiktionary via Wiktextract
Usage: archaic
Examples
The villagers were worried because the weather had been strange and several monsters had been born among the flocks and people.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
10
noun
Meaning 10
A creature of unnatural or highly unusual shape or form (which makes a frightening or unpleasant impression).
A deformed animal or person (especially, a severely deformed one); in previous centuries often taken as an ill omen at the time of its birth. (Offensive when applied to humans in modern usage.)
A disabled person.
Definition source: English Wiktionary via Wiktextract
Usage: archaic, offensive
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
11
noun
Meaning 11
A bizarre or whimsical creature.
Definition source: English Wiktionary via Wiktextract
Examples
The children decided Grover was a cuddly monster.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
12
noun
Meaning 12
A non-player character that player(s) fight against in role-playing games; a mob
Definition source: English Wiktionary via Wiktextract
Topics: games, gaming
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
13
verb
Meaning 13
To make into a monster; to categorise as a monster; to demonise.
Definition source: English Wiktionary via Wiktextract
Usage: transitive
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: monsterize
Antonyms: none provided
14
verb
Meaning 14
To behave as a monster to; to terrorise.
Definition source: English Wiktionary via Wiktextract
Usage: intransitive
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
15
verb
Meaning 15
To harass.
Definition source: English Wiktionary via Wiktextract
Usage: Australia
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
16
verb
Meaning 16
To play (a series of) non-player characters as directed, without having the responsibility of organising the game itself; generally not limited to playing literal monsters or hostile combatants.
Definition source: English Wiktionary via Wiktextract
Usage: UK
Qualifier: live action roleplaying games
Examples
Are you monstering that event?
Meaning relationships
Synonyms: none provided
Antonyms: none provided
17
noun
Meaning 17
(medicine) a grossly malformed and usually nonviable fetus
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: teras
Antonyms: none provided
Broader terms: fetus, foetus
18
noun
Meaning 18
an imaginary creature usually having various human and animal parts
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
a person or animal that is markedly unusual or deformed
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: freak, monstrosity, lusus naturae
Antonyms: none provided
Broader terms: mutant, mutation, variation, sport
Narrower terms: leviathan
20
noun
Meaning 20
someone or something that is abnormally large and powerful
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: giant, goliath, behemoth, colossus
Antonyms: none provided
Broader terms: anomaly, unusual person
21
noun
Meaning 21
a cruel wicked and inhuman person
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: fiend, devil, demon, ogre
Antonyms: none provided
Broader terms: unpleasant person, disagreeable person
Narrower terms: demoniac
History
Etymology
Etymology tree Proto-Indo-European *men- Proto-Indo-European *-yeti Proto-Indo-European *-éyeti Proto-Indo-European *monéyeti Proto-Italic *man-eje- Proto-Italic *moneō Proto-Indo-European *-tḗr Proto-Indo-European *-trom Proto-Italic *-trom Proto-Italic *monestrom Latin mōnstrumbor. Old French monstrebor. Middle English monstre English monster From Middle English monstre, from Old French monstre, mostre, moustre, from Latin mōnstrum. Displaced native Old English fīfel and Old English þyrs.
Across languages
Translations
256 source translations are retained for this English entry.