<p><strong>Verb</strong></p><ul><li>To force (a fluid) into a passage, cavity, or tissue: to inject a medicine into the veins.</li><li>To introduce (something new or different): to inject humor into a situation.</li><li>To introduce arbitrarily or inappropriately; intrude.</li><li>To interject (a remark, suggestion, etc.), as into conversation.</li></ul>