1. (noun) someone who intrudes on the privacy or property of another without permission

• intruder
• trespasser

1. (noun) someone who intrudes on the privacy or property of another without permission

• alien
• stranger
• unknown
• boarder
• crasher
• gatecrasher
• unwelcome guest
• encroacher
• invader
• infiltrator
• penetrator
• prowler
• sneak
• stalker
• pusher
• thruster
• squatter

1. (noun) someone who intrudes on the privacy or property of another without permission

• entrant
• persona non grata
• unwelcome person

1. (noun) someone who intrudes on the privacy or property of another without permission

• interlope
• intrude
• irrupt
• intrude
• intrude
• trespass
• trespass