- 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.
- land to which there is superior title and absolute ownership.
- a taxonomic category of the highest rank, just above kingdom, grouping together all forms of life having certain fundamental characteristics in common: in the three-domain system of classification adopted by many biologists, separate domains are assigned to the archaea (Archaea), bacteria (Bacteria), and eukaryotes (Eukaryota).
- Mathematics.
- the set of values assigned to the independent variables of a function.
- region (def. 11a).
- Computers.
- a group of computers and devices on a network that are administered under the same protocol.
- (on the internet) one or more computers or computer networks under the same administrative control, identified by a domain name or any of its discrete parts.
- top-level domain.
- one of many regions of magnetic polarity within a ferromagnetic body, each consisting of a number of atoms having a common polarity, and collectively determining the magnetic properties of the body by their arrangement.
- a connected region with uniform polarization in a twinned ferroelectric crystal.
- land governed by a ruler or government
- land owned by one person or family
- a field or scope of knowledge or activity
- a region having specific characteristics or containing certain types of plants or animals
- a park or recreation reserve maintained by a public authority, often the government
- the absolute ownership and right to dispose of land
- maths
- the set of values of the independent variable of a function for which the functional value exists
- any open set containing at least one point
- logic another term for universe of discourse domain of quantification
- range of significance (esp in the phrase domain of definition)
- one of the regions in a ferromagnetic solid in which all the atoms have their magnetic moments aligned in the same direction
- a group of computers, functioning and administered as a unit, that are identified by sharing the same domain name on the internet
- the highest level of classification of living organisms. Three domains are recognized: Archaea (see archaean), Bacteria (see bacteria), and Eukarya (see eukaryote)
- a structurally compact portion of a protein molecule
