An intruder is someone who enters a place or situation despite not being invited. If a Girl Scout comes to your door to sell you cookies but ends up trying to watch TV with you, you can call her an intruder.

INTRUDER definition: 1. someone who is in a place or situation where they are not wanted: 2. someone who enters a place…. Learn more.

The meaning of INTRUDER is one that intrudes; specifically : a military aircraft assigned to penetrate alone into enemy territory usually at night. How to use intruder in a sentence.

An intruder is a person who enters a place without permission. Windows and lighting help homeowners see intruders.

intruder (ɪnˈtruːdə) n a person who enters a building, grounds, etc, without permission

Nov 7, 2025 · An intruder is someone who enters a property, building, or space without permission or legal right to be there. We’re talking about unauthorized individuals who break into homes, …

Definition of intruder in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

The other children regarded him as an intruder. The police arrested the intruder.

INTRUDER meaning: 1. someone who is in a place or situation where they are not wanted: 2. someone who enters a place…. Learn more.

An intruder is a person who enters a place without permission. Windows and lighting help homeowners see intruders.