1. Control or the exercise of control; sovereignty: "The devil ... has their souls in his possession, and under his dominion" (Jonathan Edwards).
2. A territory or sphere of influence or control; a realm.
3. often Dominion A self-governing nation under the nominal rule of the British monarch.
4. dominions Christianity See domination.
[Middle English dominioun, from Old French dominion, from Medieval Latin dominiō, dominiōn-, from Latin dominium, property, from dominus, lord; see dem- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.