1. a particular environment or walk of life
2. territory over which rule or control is exercised
- his domain extended into Europe
3. (mathematics) the set of values of the independent variable for which a function is defined
4. people in general; especially a distinctive group of people with some shared interest
Similar word(s): world
5. the content of a particular field of knowledge
Sentences with domain as a noun:
- The king ruled his domain harshly.
- Dealing with complaints isn't really my domain: get in touch with customer services.
- His domain is English history.