What does the word clam mean?

Usage examples for clam

  1. He shut up like a clam and only said: " Do what you please. – A Daughter of the Land by Gene Stratton-Porter
  2. Daddy Bunker, who had been reading the paper on the porch of Cousin Tom's bungalow at Seaview, hurried down to the little pier that was built out into Clam River. – Six Little Bunkers at Grandpa Ford's by Laura Lee Hope
  3. When I was on land a little while, I noticed in front of a few houses, walks, that I knew at a glance were made from clam- shells. – Lord Dolphin by Harriet A. Cheever