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capstone

[kap-stohn]
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noun
  1. a finishing stone of a structure.
  2. the crowning achievement, point, element, or event.
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Origin of capstone

1350–1400; Middle English. See cap1, stone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for capstone

top, summit, pinnacle, height, capstone, culmination, acme, apex, tip, climax, crown, apogee, meridian, head, zenith, vertex, roof, peak, crest, max

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British Dictionary definitions for capstone

capstone

copestone (ˈkəʊpˌstəʊn)

noun
  1. one of a set of slabs on the top of a wall, building, etc
  2. mountaineering a chockstone occurring at the top of a gully or chimney
  3. a crowning achievement; peakthe capstone of his career
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for capstone

n.

also cap-stone, topmost stone in a construction, 1680s, from cap + stone (n.). Earliest use is figurative.

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Online Etymology Dictionary, © 2010 Douglas Harper