intrusion: Meaning and Definition of

in•tru•sion

1. an act or instance of intruding.
2. the state of being intruded.
1. an illegal act of entering, seizing, or taking possession of another's property.
2. a wrongful entry after the determination of a particular estate, made before the remainderman or reversioner has entered.
1. emplacement of molten rock in preexisting rock.
2. plutonic rock emplaced in this manner.
3. a process analogous to magmatic intrusion, as the injection of a plug of salt into sedimentary rocks.
4. the matter forced in.