Definition of "demon" in English

noun

1. An evil supernatural spirit.

2. A neutral supernatural spirit.

3. Someone with great strength, passion or skill for a particular activity, pursuit etc.; an enthusiast.

   • He’s a demon at the card tables.

4. (card games) A type of patience or solitaire (card game) played in the UK and/or US.

5. Any of various hesperiid butterflies of the genera Notocrypta and Udaspes.

noun

1. (physics) Acronym of distinct electron motion particle: a quasiparticle, a type of massless neutral electron excitation associated with superconductivity.

noun

1. (computing) Alternative spelling of daemon.