Source : Webster's Revised Unabridged Dictionary (1913)

Portable \Port"a*ble\, a. [L. portabilis, fr. portare to carry:
   cf. F. portable. See {Port} demeanor.]
   1. Capable of being borne or carried; easily transported;
      conveyed without difficulty; as, a portable bed, desk,
      engine. --South.

   2. Possible to be endured; supportable. [Obs.]

            How light and portable my pain seems now! --Shak.

   {Portable forge}. See under {Forge}.

   {Portable steam engine}. See under {Steam engine}.

Source : WordNet®

portable
     adj 1: easily or conveniently transported; "a portable television
            set" [ant: {unportable}]
     2: of a motor designed to be attached to the outside of a
        boat's hull; "a portable outboard motor"

portable
     n : a small light typewriter; usually with a case in which it
         can be carried

Source : Free On-Line Dictionary of Computing

portable
     
        {portability}