Meaning of the word "next door" in English

What does "next door" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

next door

US /ˈnɛkst ˈdɔːr/
UK /ˈnɛkst ˈdɔːr/

Adverb

in or at the next house or room

Example:
My best friend lives next door.
The new restaurant opened next door to the bakery.

Adjective

located in the house or room next to one's own

Example:
Our next-door neighbors are very friendly.
I heard a loud noise from the next-door apartment.