<p><strong>Noun:</strong></p><ul><li>a field of action, thought, influence, etc.: the domain of science.</li><li>the territory governed by a single ruler or government; realm.</li><li>a realm or range of personal knowledge, responsibility, etc.</li><li>a region characterized by a specific feature, type of growth or wildlife, etc.: We entered the domain of the pine trees.</li><li>Law: land to which there is superior title and absolute ownership.</li><li>Biology: 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).</li><li>Mathematics: the set of values assigned to the independent variables of a function.</li><li>Computers: a group of computers and devices on a network that are administered under the same protocol.</li><li>(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.</li><li>Physics: 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.</li></ul>