<p><strong>Noun:</strong></p><ul><li>an act or instance of immersing.</li><li>state of being immersed.</li><li>immersed.</li><li>state of being deeply engaged or involved; absorption.</li><li>baptism in which the whole body of the person is submerged in the water.</li><li>Also called ingress.</li><li>Astronomy: the entrance of a heavenly body into an eclipse by another body, an occultation, or a transit.</li></ul><p><strong>Adjective:</strong></p><ul><li>concentrating on one course of instruction, subject, or project to the exclusion of all others for several days or weeks; intensive: an immersion course in conversational French.</li></ul>