1. [ noun ] a central cohesive source of support and stability
Synonyms: anchor backbone linchpin lynchpin mainstay

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

Related terms: support anchor
2. [ noun ] (architecture) the central building block at the top of an arch or vault
Synonyms: key headstone
Related terms: building_block quoin arch
Similar spelling:   Kestner