Definition of "Nan"

Nan¹

noun
1. (World War II era, joint US/RAF) radiotelephony clear-code word for the letter N.
proper noun
1. A diminutive of the female given name Ann and Nancy.
  Quotations
  My Nan shall be the queen of all the fairies, / Finely attired in a robe of white.
  c. 1597 (date written), William Shakespeare, “The Merry Wiues of Windsor”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act IV, scene iv]