Meaning of domain

do•main

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. land to which there is superior title and absolute ownership.
    1. the set of values assigned to the independent variables of a function.
    2. region (def. 11a).
  6. 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.
  7. a connected region with uniform polarization in a twinned ferroelectric crystal.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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