secondarydoor
nounUK /ˈsekəndəri dɔː/
US /ˈsekənderi dɔːr/
A second door that lets you get in or out of a place.
The school has a main entrance and a secondary door at the back.
OTHER MEANINGS
2. A backup door used when the main one is blocked or locked.
In an emergency, use the secondary door near the stairs.
3. A door that is less important or less used than the main door.
The secondary door is only opened on busy days.
4. A door in a building that leads to a smaller or inner area.
The secondary door connects the hallway to the storage room.