a central cohesive source of support and stability: "faith is his anchor"; "he is the linchpin of this firm"
a pin inserted through an axletree to hold a wheel on
pin inserted through an axletree to hold a wheel on
a central cohesive source of support and stability; "faith is his anchor"; "the keystone of campaign reform was the ban on soft money"; "he is the linchpin of this firm"
a central cohesive source of support and stability
