Intrusion - Definition

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