The definition of an interloper is an intruder or someone who butts in where he isn't wanted.
One who commits the act or crime of theft.
(Informal) A person who attends a social affair without an invitation or attends a performance, etc. without paying admission
(Electronics) A device that periodically and automatically opens and closes an electric circuit, producing pulses.
A person who mixes into other people's affairs; meddler or gossip
The definition of a snoop is a detective or a person who investigates by poking around into people's private affairs.
Effort, especially when inconvenient or bothersome:
One who gains admittance, as to a party or concert, without being invited or without paying.
Find another word for intruder. In this page you can discover 24 synonyms, antonyms, idiomatic expressions, and related words for intruder, like: interloper, thief, invader, encroacher, unwanted person, interferer, prowler, gate-crasher, interrupter, disrupting element and busybody.