monster

1 noun (C)

1 IN STORIES a large ugly frightening creature, especially an imaginary one: the Kraken and other legendary sea monsters | a prehistoric monster

2 CRUEL PERSON someone who is very cruel and evil: Only a monster could kill all those women and feel no remorse.

3 CHILD often humorous a small child, especially one who is behaving badly: I've got to get home and feed this little monster.

4 STH LARGE informal an object, animal etc that is unusually large: That car of his is an absolute monster!

5 a dangerous or threatening problem, especially one that develops gradually: It was years before people realized what a monster industrialization had created.

2 adjective (only before noun) informal unusually large: the monster fortunes of the Mellons and DuPonts