from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The top stone of a structure or wall.
  • n. The crowning achievement or final stroke; the culmination or acme.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of the stones making up the top layer of a wall; a coping stone
  • n. A crowning achievement, culmination or finishing touch

from the GNU version of the Collaborative International Dictionary of English

  • n. A fossil echinus of the genus Cannulus; -- so called from its supposed resemblance to a cap.

from The Century Dictionary and Cyclopedia

  • n. In architecture, the uppermost or finishing stone of a structure, as of a parapet, a turret, etc.
  • n. In zoöl, a fossil echinite (sea-urchin) of the genus Conulus: so named from its resemblance to a cap.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a stone that forms the top of wall or building
  • n. a final touch; a crowning achievement; a culmination


Sorry, no etymologies found.



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  • With that in mind, those who have not read the Quran will see that it is a capstone to all the Scriptures of the West: Jewish, Christian, and Muslim; all of which share the same God, but use different metaphors by which to worship YHWH, the Trinity, or Allah.

    March 1, 2018

  • In the background of his thoughts Theron had carried along a notion of going and dining with Father Forbes when the time for the evening meal should arrive. The idea in itself attracted him, as a fitting capstone to his resolve not to go home to supper.

    - Harold Frederic, The Damnation of Theron Ware, ch. 26

    August 8, 2008