资料来源 : Webster's Revised Unabridged Dictionary (1913)

Availability \A*vail`a*bil"i*ty\, n.; pl. {Availabilities}.
   1. The quality of being available; availableness.

   Note: The word is sometimes used derogatively in the sense of
         ``mere availableness,'' or capability of success
         without regard to worthiness.

               He was . . . nominated for his availability.
                                                  --Lowell.

   2. That which is available.