1. Of or relating to the geographic area under a given jurisdiction: the territorial limits of a country.
2. Relating or restricted to a particular territory; regional: a territorial court.
3. often Territorial Of or relating to an administrative territory: the territorial government of the US Virgin Islands; Whitehorse, the territorial capital of the Yukon.
4. often Territorial Organized for national or home defense: the British Territorial Army.
5. Biology Displaying territoriality; defending a territory from intruders: territorial behavior; a territorial species.
n. also Territorial
A member of a territorial army.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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.