Refers to a gate or entrance, especially of a house, garden, or traditional building. Often implies an outdoor entrance rather than an interior door.
A car is parked in front of the gate.
Metonymic use: the gate stands for the household or family. Often used in formal or literary contexts, or in set phrases like 門を構える (to set up a household).
I opened the gate and entered the garden.
He has an impressive household.
That family has been a scholarly household for generations.
setting off; departure; leaving home · starting a new life; fresh start
barking up the wrong tree; misdirected effort or complaint
doorway; entrance; gate
gate fire; ceremonial fire at a gate
row of houses · each house; every house
The reading かど is the native Japanese word for 'gate' or 'entrance', predating the borrowing of the kanji 門. The metonymic extension to 'household' is a common semantic shift in Japanese.