Note: The adjective is also spelled 'next-door'.
1.
If a room or building is ~, it is the next one to the right or left.
I went ~ to the bathroom...
She was ~ at the time.
...the old lady who lived ~...
The flat ~ was empty.
ADV: ADV after v, be ADV, n ADV
•
Next door is also an adjective.
She wandered back into the ~ room...
The wires trailed through other parts of the HQ into a ~ building.
ADJ: ADJ n
•
If a room or building is ~ to another one, it is the next one to the left or right.
The kitchen is right ~ to the dining room.
PREP-PHRASE
2.
The people ~ are the people who live in the house or flat to the right or left of yours.
The neighbors thought the family ~ had moved.
ADV: n ADV
•
Next door is also an adjective.
Our ~ neighbour knocked on the door to say that our car had been stolen.
ADJ: ADJ n
3.
If you refer to someone as the boy ~ or the girl ~, you mean that they are pleasant and respectable but rather dull.
She was the girl-next-door type.
PHRASE