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tr.v. en·joined, en·join·ing, en·joins
a. To direct (a person) to do something; order or urge: The doctor enjoined the patient to walk daily.
b. To require or impose (an action or behavior, for example) with authority and emphasis; prescribe.
2. To prohibit or forbid: The judge enjoined the merger of the firms. The court enjoined the company from merging with its competitor.
[Middle English enjoinen, from Old French enjoindre, from Latin iniungere : in-, causative pref.; see en-1 + iungere, to join; see yeug- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.