a field of action, thought, influence, etc.:
the domain of science.
the territory governed by a single ruler or government; realm.
a realm or range of personal knowledge, responsibility, etc.
a region characterized by a specific feature, type of growth or wildlife, etc.:
We entered the domain of the pine trees.
Law. land to which there is superior title and absolute ownership.
- the set of values assigned to the independent variables of a function.
- region (def 11a).
- a group of computers and devices on a network that are administered under the same protocol.
- the top level in a domain name, indicating the type of organization, geographical location, or both, and officially designated in the suffix, as .edu for institutions of higher education.