From Longman Dictionary of Contemporary Englishintruderin‧trud‧er /ɪnˈtruːdə $ -ər/ ●○○ noun [countable]1ENTERsomeone who illegally enters a building or area, usually in order to steal something
The police think the intruder got in through an unlocked window.2WANTsomeone who is in a place where they are not wanted
At first I felt like an intruder in their family.Examples from the Corpusintruder• Along with other equipment, intruders took a computer that was used by handicappedkids.
