'Zed' definitions:

Definition of 'zed'

(from WordNet)
noun
The 26th letter of the Roman alphabet; "the British call Z zed and the Scots call it ezed but Americans call it zee"; "he doesn't know A from izzard" [syn: Z, z, zee, zed, ezed, izzard]

Definition of 'Zed'

From: GCIDE
  • Zed \Zed\, n. [F., probably through It. zeta, fr. L. zeta. See Zeta.] The letter Z; -- called also zee, and formerly izzard. "Zed, thou unnecessary letter!" --Shak. [1913 Webster]