WordWeb Online

1. Any entry into an area not previously occupied
   "an intrusion of tourists"
   - invasion, encroachment
    
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
   - trespass, encroachment, violation, usurpation

Derived forms: intrusions

See also: intrude

Type of: actus reus, entering, entrance, entry, geologic process, geological process, incoming, ingress, misconduct, rock, stone, wrongdoing, wrongful conduct

Encyclopedia: Intrusion