In plain English
It is another version of the same key, kept in case the main one is not available. Its purpose is to serve instead of the original when needed.
In context
Here, "spare key" labels an additional copy of a key that is identified as a backup or replacement.
- Situation
- Managing move-in, move-out, inventory, keys, deposits, and condition reports
- What it communicates
- labels an additional copy of a key.
Meaning limits
The term alone does not say who keeps it, where it is kept, or when it may be used.
Examples
“When his house key snapped, he unlocked the door with the spare key.”
“A spare key stays in the hallway drawer beside the torch.”