The Collaborative International Dictionary of English v.0.48:

Covent \Cov"ent\ (k?v"ent), n. [OF. covent, F. couvent. See
   Convent.]
   A convent or monastery. [Obs.] --Bale.
   [1913 Webster]

   Covent Garden, a large square in London, so called because
      originally it was the garden of a monastery.
      [1913 Webster]