- invasion, encroachment, intrusion - any entry into an area not previously occupied; "an invasion of tourists"; "an invasion of locusts"
--1 is a kind of entrance, entering
- intrusion - entrance by force or without permission or welcome
--2 is a kind of entrance, entering, entry, ingress, incoming
- intrusion - the forcing of molten rock into fissures or between strata of an earlier rock formation
--3 is a kind of geological process, geologic process
- intrusion - rock produced by an intrusive process
--4 is a kind of rock, stone
- trespass, encroachment, violation, intrusion, usurpation - entry to another's property without right or permission
--5 is a kind of wrongdoing, wrongful conduct, misconduct, actus reus
--5 has particulars: inroadDerived forms: verb intrude2, verb intrude1 - intrusion - the forcing of molten rock into fissures or between strata of an earlier rock formation