<p><strong>Verb (used without object)</strong></p><ul><li>intervened</li><li>intervening</li><li>to come between disputing people, groups, etc.; intercede; mediate.</li><li>Synonyms: interpose, arbitrate</li><li>to occur or be between two things.</li><li>to occur or happen between other events or periods: Nothing important intervened between the meetings.</li><li>(of things) to occur incidentally so as to modify or hinder: We enjoyed the picnic until a thunderstorm intervened.</li><li>to interfere with force or a threat of force: to intervene in the affairs of another country.</li><li>Law: to interpose and become a party to a suit pending between other parties.</li></ul>