intrusion Meaning, Definition & Usage

  1. noun any entry into an area not previously occupied
    invasion; encroachment.
    • an invasion of tourists
    • an invasion of locusts
  2. noun entrance by force or without permission or welcome
  3. noun the forcing of molten rock into fissures or between strata of an earlier rock formation
  4. noun rock produced by an intrusive process
  5. noun entry to another's property without right or permission
    violation; trespass; encroachment; usurpation.

WordNet

In*tru"sion noun
Etymology
Cf. F. intrusion. See Intrude.
Definitions
  1. The act of intruding, or of forcing in; especially, the forcing (one's self) into a place without right or welcome; encroachment.
    Why this intrusion? Were not my orders that I should be private? Addison.
  2. (Geol.) The penetrating of one rock, while in a plastic or metal state, into the cavities of another.
  3. (Law) The entry of a stranger, after a particular estate or freehold is determined, before the person who holds in remainder or reversion has taken possession.
  4. (Scotch Ch.) The settlement of a minister over 3 congregation without their consent.

Webster 1913