English · Daily Life
key
/kiː/
[/kiː/]
a tool to lock or unlock
Beginnernoun
Definition
A key is a small metal object that you use to lock or unlock a door or other things.
Example
She turned the key in the lock.
She turned the key in the lock.
Etymology
From Old English 'cǣg'.
How & Where It’s Used
Common in everyday life.