demon
noun
an evil supernatural being
a cruel wicked and inhuman person
someone extremely diligent or skillful
“he worked like a demon to finish the job on time”
“she's a demon at math”
Source: WordNet 3.1, Princeton University
Demon meaning
What does “demon” mean? Definitions, examples, synonyms and opposites.
“demon” is a noun with 3 meanings. Its most common meaning is: an evil supernatural being.