<p><strong>Noun:</strong></p><ul><li>An act or instance of intruding.</li><li>The state of being intruded.</li><li>Law: An illegal act of entering, seizing, or taking possession of another's property.</li><li>A wrongful entry after the determination of a particular estate, made before the remainderman or reversioner has entered.</li><li>Geology: Emplacement of molten rock in preexisting rock.</li><li>Plutonic rock emplaced in this manner.</li><li>A process analogous to magmatic intrusion, as the injection of a plug of salt into sedimentary rocks.</li><li>The matter forced in.</li></ul>