Definition, Meaning & Synonyms
keystone
noun
/ˈkiːstəʊn/
Definition
The central stone at the summit of an arch, locking the whole arch together.
Examples
- The keystone of the project was cooperation among all team members.
- In architecture, the keystone is essential for the stability of an arch.
Meaning
A key element or part that holds together all other parts.
Synonyms
- cornerstone
- foundation
- linchpin
