Definition of keystoned in US English:

keystoned

adjective

  • 1Constructed or fitted with a keystone.

  • 2Cinematography, Television, and Photography. Of an image: showing the keystone effect; distorted by keystoning.

  • 3Electrical Engineering. Of a cable: having constituent strands made with flattened sides so that they fit together better inside the cable.

Origin

Mid 19th century; earliest use found in The Gentleman's Magazine. From keystone + -ed.

Pronunciation

keystoned

/ˈkiːstəʊnd/