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English definition of “monster”

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.

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)
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