Source : Webster's Revised Unabridged Dictionary (1913)

Dit \Dit\, n. [{Ditty}.]
   1. A word; a decree. [Obs.]

   2. A ditty; a song. [Obs.]

Dit \Dit\, v. t. [AS. dyttan, akin to Icel. ditta.]
   To close up. [Obs.] --Dr. H. More.

Source : WordNet®

dit
     n : the shorter of the two telegraphic signals used in Morse
         code [syn: {dot}]