- Squeezed together; jammed: The cheering fans were chock-a-block in the stands.
- Completely filled; stuffed: “I recommend the north shore chowder, chockablock with pieces of seasonal fish” (Charles Monaghan).
- Nautical Drawn so close as to have the blocks touching. Used of a ship's hoisting tackle.
Chock: a hall that was chock-a-block full.
Origin of chock-a-blockAlteration (influenced by chock) of block-a-block : block + a–2 + block.
(comparative more chock-a-block, superlative most chock-a-block)
- Alternative spelling of chockablock.