Noun intrusion has 5 senses
  1. 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
  2. intrusion - entrance by force or without permission or welcome
    --2 is a kind of
    entrance, entering, entry, ingress, incoming
  3. 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
  4. intrusion - rock produced by an intrusive process
    --4 is a kind of
    rock, stone
  5. 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: inroad
    Derived forms: verb intrude2, verb intrude1
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