The forcible inclusion or entry of an external group or individual; the act of intruding.
The insertion of a phoneme into the pronunciation of a word despite its absence from the spelling. (e.g. intrusive r)
A structure that lies within a historic district but is nonhistoric and irrelevant to the district.
Magma forced into other rock formations; the rock formed when such magma solidifies.
An act that goes beyond generally accepted boundaries.
A violation of a law, duty or commandment.
A relative rise in sea level resulting in deposition of marine strata over terrestrial strata.