What is the meaning of Intrusion?

The forcible inclusion or entry of an external group or individual; the act of intruding.

A penetration by hackers, a computer virus, etc.

The insertion of a phoneme into the pronunciation of a word despite its absence from the spelling. (e.g. intrusive r)

Something that is intrusive or that has arisen from an act of intruding.

1. A feeling of being intruded upon; the state or condition of being intruded.
2. Magma forced into other rock formations; the rock formed when such magma solidifies.
3. A structure that lies within a historic district but is nonhistoric and irrelevant to the district.
4. An involuntarily arising idea or memory that is nuisant and falsifies an accurate impression of the world.

   A feeling of being intruded upon; the state or condition of being intruded.

   Magma forced into other rock formations; the rock formed when such magma solidifies.

   A structure that lies within a historic district but is nonhistoric and irrelevant to the district.

   An involuntarily arising idea or memory that is nuisant and falsifies an accurate impression of the world.

   A swarm or nest of cockroaches, infesting a structure.

   intrusion

   Source: wiktionary.org