— intrusional , adj.
/in trooh"zheuhn/ , n.
1. an act or instance of intruding.
2. the state of being intruded.
3. Law.
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.
4. Geol.
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.
[ 1250-1300; ME intrusion- (s. of intrusio ), equiv. to L intrus ( us ), ptp. of intrudere to INTRUDE (equiv. to intrud- v.s. + -tus ptp. suffix, with dt s ) + -ion- -ION ]