<p><strong>Verb (used with object)</strong></p><ul><li>to place between; cause to intervene: to interpose an opaque body between a light and the eye.</li><li>to put (a barrier, obstacle, etc.) between or in the way of.</li><li>to put in (a remark, question, etc.) in the midst of a conversation, discourse, or the like.</li><li>to bring (influence, action, etc.) to bear between parties, or on behalf of a party or person.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to come between other things; assume an intervening position or relation.</li><li>to step in between parties at variance; mediate.</li><li>to put in or make a remark by way of interruption.</li></ul>