Pronunciation: (dō-mān'),[key] —n. 1. a field of action, thought, influence, etc.: the domain of science. 2. the territory governed by a single ruler or government; realm.
3. a realm or range of personal knowledge, responsibility, etc.
4. a region characterized by a specific feature, type of growth or wildlife, etc.: We entered the domain of the pine trees. 5. Law.land to which there is superior title and absolute ownership.
6. Math. a. the set of values assigned to the independent variables of a function.
b. region (def. 11a).
7. 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.
8. Crystall.a connected region with uniform polarization in a twinned ferroelectric crystal.