Source : Webster's Revised Unabridged Dictionary (1913)

Promptitude \Prompt"i*tude\, n. [F., fr. L. promptitudo. See
   {Prompt}, a.]
   The quality of being prompt; quickness of decision and action
   when occasion demands; alacrity; as, promptitude in
   obedience.

         Men of action, of promptitude, and of courage. --I.
                                                  Taylor.

Source : WordNet®

promptitude
     n : the characteristic of doing things without delay [syn: {promptness}]