Definitions for keystone

Definitions for (noun) keystone

Main entry: key, keystone, headstone

Definition: the central building block at the top of an arch or vault

Main entry: lynchpin, mainstay, keystone, linchpin, backbone, anchor

Definition: a central cohesive source of support and stability

Usage: faith is his anchor; the keystone of campaign reform was the ban on soft money; he is the linchpin of this firm

Visual thesaurus for keystone