intruder

Definitions

A person who enters a building, land, or area without permission.

Someone who puts themselves into a situation or place where they are unwelcome or uninvited.

Examples

The security alarm sounded as soon as the intruder stepped onto the property.

The homeowner grabbed a flashlight to investigate the noise made by the suspected intruder.

Synonyms

trespasser invader infiltrator interloper uninvited guest encroacher prowler

Antonyms

guest invitee welcome visitor inhabitant resident occupant member