intruder

word

/ˌɪnˈtɹudɝ/
in-TROO-dur
/ɪntɹˈuːdɐ/
in-TROO-duh

Definition

An intruder is a person who enters a place without permission, especially someone who tries to go somewhere private or forbidden.

Usage & Nuances

Commonly used in security, crime, or privacy contexts. Almost always implies someone unwanted or breaking rules. Pairs with words like 'alarm', 'home', 'alert'. Not used for animals or things.

Example Sentences

A dog can help protect your home from an intruder.

basic

We heard strange noises last night, but luckily it wasn’t an intruder.

natural

The security camera shows the intruder climbing over the fence.

natural

The police caught an intruder in the house.

basic

The alarm went off when an intruder entered.

basic

No one noticed the intruder until it was too late.

natural