a large, ugly, and frightening imaginary creature

a monster with the head of a hyena and hindquarters of a wolf

a world of fable, inhabited by other-worldly monsters

a thing of extraordinary or daunting size

this is a monster of a book, almost 500 pages

a monster 36lb carp

a congenitally malformed or mutant animal or plant

criticize or reprimand severely

my mum used to monster me for coming home so late