Source : Webster's Revised Unabridged Dictionary (1913)

Eligible \El"i*gi*ble\, a. [F. ['e]ligible, fr. L. eligere. See
   {Elect}.]
   1. That may be selected; proper or qualified to be chosen;
      legally qualified to be elected and to hold office.

   2. Worthy to be chosen or selected; suitable; desirable; as,
      an eligible situation for a house.

            The more eligible of the two evils.   --Burke.

Source : WordNet®

eligible
     adj 1: qualified for or allowed or worthy of being chosen;
            "eligible to run for office"; "eligible for retirement
            benefits"; "an eligible bachelor" [ant: {ineligible}]
     2: prohibited by official rules; "an eligible pass receiver"