keystone
/ˈkiː.stəʊn/ noun, verb, proper noun
Forms keystones keystoning keystoned
- noun (architecture) The top stone of an arch.
- noun Something on which other things depend for support.
- noun (retail) A retail price that is double the cost price; a markup of 100%.
- noun (baseball) The combination of the shortstop and second baseman.
- verb (transitive) To distort (an image) by projecting it onto a surface at an angle, which for example causes a square to look like a trapezoid.
- verb (transitive, retail) To double the cost price in order to determine the retail price; to apply a markup of 100%.
- proper noun A census-designated place in Colorado.
- proper noun A city and town in Iowa.
- proper noun A ghost town in North Dakota.
- proper noun A town in South Dakota.
Synonyms
Etymology
Definition 4 (retail) possibly originated in the jewelry industry in the magazine called "Jewelers' Circular-Keystone".
Webster’s 1913
- noun The central or topmost stone of an arch. This in some styles is made different in size from the other voussoirs, or projects, or is decorated with carving. See Illust. of Arch. Keystone State, the State of Pennsylvania; --so called from its having been the central State of the Union at the formation of the Constitution.
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “keystone”, CC BY-SA 4.0. Details