intruder

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++in·trud·er /ɪnˈtruːdə $ -ər/ ●○○ noun [countable]  1  ENTERsomeone who illegally enters a building or area, usually in order to steal something 非法闯入者〔通常指小偷〕 The police think the intruder got in through an unlocked window. 警察认为闯入者是从一扇没上锁的窗子进入的。2  WANTsomeone who is in a place where they are not wanted 不请自来者，不速之客 At first I felt like an intruder in their family. 起初我觉得自己是他们家的不速之客。

Examples from the Corpus

intruder• Along with other equipment, intruders took a computer that was used by handicapped kids.

in·trud·er nounChineseSyllable  

Corpus or a someone enters illegally building who

intruder
in‧trud‧er /ɪnˈtruːdə $ -ər/ noun [countable]
1. someone who illegally enters a building or area, usually in order to steal something:
    The police think the intruder got in through an unlocked window.
2. someone who is in a place where they are not wanted:
    At first I felt like an intruder in their family.

in·truderBrE /ɪnˈtruːdə(r)/ 🔊NAmE /ɪnˈtruːdər/ 🔊 nouna person who enters a building or an area illegally 闯入者；侵入者a person who is somewhere where they are not wanted 不受欢迎的人；不速之客◆The people in the room seemed to regard her as an unwelcome intruder. 屋子里的人似乎把她当成不受欢迎的外人。🔊🔊