Source : Webster's Revised Unabridged Dictionary (1913)

Nan \Nan\, inerj. [For anan.]
   Anan. [Prov. Eng.]

Source : WordNet®

nan
     n 1: your grandmother
     2: a river of western Thailand flowing southward to join the
        Ping River to form the Chao Phraya [syn: {Nan River}]
     3: leavened bread baked in a clay oven in India; usually shaped
        like a teardrop

Source : Free On-Line Dictionary of Computing

NaN
     
        {Not-a-Number}