Doughnut

the Doughnut

1. (informal, UK) The head office of the GCHQ in Cheltenham, UK.
   • 2015 November 19, Steve Rose, “The future is round: why modern architecture turned doughnut-shaped”, in The Guardian‎^[1]:

     Former hackers as well as government suits roam the curved corridors of “the Doughnut”, as GCHQ’s base is known.

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Doughnut m (strong, genitive Doughnuts, plural Doughnuts)

1. Alternative form of Donut