Pronunciation: (in-trOO'zhun), [key]
1. an act or instance of intruding.
2. the state of being intruded.
a. an illegal act of entering, seizing, or taking possession of another's property.
b. a wrongful entry after the determination of a particular estate, made before the remainderman or reversioner has entered.
a. emplacement of molten rock in preexisting rock.
b. plutonic rock emplaced in this manner.
c. a process analogous to magmatic intrusion, as the injection of a plug of salt into sedimentary rocks.
d. the matter forced in.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.