Definition of monster noun from the Oxford Advanced Learner's Dictionary

     

    monster

     noun
    noun
    BrE BrE//ˈmɒnstə(r)//
     
    ; NAmE NAmE//ˈmɑːnstər//
     
     
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  1. 1 (in stories) an imaginary creature that is very large, ugly and frightening a monster with three heads prehistoric monsters
  2. 2an animal or a thing that is very large or ugly Their dog's an absolute monster!
  3. 3a person who is very cruel and evil
  4. 4(humorous) a child who behaves badly
  5. Word Origin late Middle English: from Old French monstre, from Latin monstrum ‘portent or monster’, from monere ‘warn’.Extra examples He wanted to fight the monster of poverty. I wanted to fight these monsters: I didn’t want to go on living with them. The government has created a bureaucratic monster. The tabloid papers labelled him ‘an evil sex monster’. What sort of inhuman monster could do such a thing? a barren wilderness inhabited by monsters cheap sci-fi films with bug-eyed monsters The man is a monster; he terrifies me.
See the Oxford Advanced American Dictionary entry: monster