Definition of: enjoin

(in·join′) v.t.
1. To order authoritatively and emphatically; direct (a person or group) to a course of action, conduct, etc.
2. To impose (a condition, course of action, etc.) on a person or group.
3. To forbid or prohibit, especially by judicial order or injunction. See synonyms under DICTATE. [<OF enjoindre <L injungere <in- on + jungere join]
—en·join′er noun