Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “monster”


noun [C]  /ˈmɑn·stər/ us  

monster noun [C] (CREATURE)

any imaginary frightening creature, esp. one that is large and strange

monster noun [C] (EVIL PERSON)

a person who does very cruel and evil acts: To the whole world, he was a monster.


adjective [not gradable]  /ˈmɑn·stər/ us  

monster adjective [not gradable] (BIG)

very big, or too big: a monster shark
(Definition of monster from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of monster?
Add Cambridge dictionaries to your browser to your website

Definitions of “monster” in other dictionaries

Word of the Day


to throw or drop something carelessly

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More