v. u·nit·ed, u·nit·ing, u·nites
1. To bring together so as to form a whole: The different structures are united in a single flower.
2. To combine (people) in interest, attitude, or action: united the rival factions of the party.
3. To join (a couple) in marriage.
4. To have or demonstrate in combination: The course unites current theory and practice.
1. To become joined, formed, or combined into a unit: when reproductive cells unite.
2. To join and act together in a common purpose or endeavor. See Synonyms at join.
[Middle English uniten, from Latin ūnīre, ūnīt-, from ūnus, one; see oi-no- 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.