Definitions of monster

1. To make monstrous.

2. Specifically , an animal or plant departing greatly from the usual type, as by having too many limbs.

3. Any thing or person of unnatural or excessive ugliness, deformity, wickedness, or cruelty.

4. Any animal or thing out of the usual course of nature; something very huge or remarkably deformed or hideous; a person remarkable for extreme wickedness, cruelty, etc.

5. Anything out of the usual course of nature: a prodigy: anything horrible from ugliness or wickedness.

6. A prodigy; anything frightful and unnatural; atrocious criminal.

7. Anything hideous or abnormal; one atrociously wicked or cruel.

8. A very large person or thing.

9. An unnatural production; something greatly deformed; a person unnaturally wicked or vicious.

10. Anything out of the common order of nature; a creature with parts not natural; a person looked upon with horror on account of extraordinary crimes, or of deformity, or power to do harm; anything uncommonly large.

11. Monstrous in size.