Copestone
"Copestone" in a Sentence (2 examples)
The universe is finished; the copestone is on, and the chips were carted off a million years ago.
For small erections may be finished by their first architects ; grand ones, true ones, ever leave the copestone to posterity.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.