keystonenoun [ C ]
uk/ˈkiː.stəʊn/us/ˈkiː.stoʊn/keystone noun [ C ] (STONE)
specialized architecture the middle stone in the top of an arch that has a special shape and holds all the other stones in position
Thesaurus: synonyms and related words
Parts of buildings: arches, columns & beams
- arch
- architrave
- archway
- beam
- capital
- colonnade
- column
- corbel
- Corinthian
- Doric
- Ionic
- joist
- pedestal
- pillar
- plinth
- portico
- truss
- vault
- vaulted
- vaulting
keystone noun [ C ] (IMPORTANT PART)
the most important part of a plan, idea, etc. on which everything else depends
Thesaurus: synonyms and related words
Important and essential things
- -based
- amenity
- be-all
- big league
- biggie
- building block
- flagship
- grandaddy
- heavyweight
- hot button
- kernel
- keynote
- lifeblood
- nucleus
- pivot
- prerequisite
- priority
- requisite
- sine qua non
- supply
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