Sekirov Dictionary

keystone

/ˈkiː.stəʊn/

noun 4
verb 2
forms 3

noun4

•
The top stone of an arch.
- The tunnel, which is 1,000 yd. long, had been closed to passenger traffic since November 17, 1949, after some of the keystones had worked loose. — 1950
•
Something on which other things depend for support.
- Tension between empirical and theoretical knowledge is keystone to sociological and to organizational theories, as early as in Marx's and Weber's frameworks. — 1999
A retail price that is double the cost price; a markup of 100%.
The combination of the shortstop and second baseman.

verb2

To distort (an image) by projecting it onto a surface at an angle, which for example causes a square to look like a trapezoid.
To double the cost price in order to determine the retail price; to apply a markup of 100%.

forms

keystoned · keystoning · keystones

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