Source : Webster's Revised Unabridged Dictionary (1913)

Fairly \Fair"ly\, adv.
   1. In a fair manner; clearly; openly; plainly; fully;
      distinctly; frankly.

            Even the nature of Mr. Dimmesdale's disease had
            never fairly been revealed to him.    --Hawthorne.

   2. Favorably; auspiciously; commodiously; as, a town fairly
      situated for foreign traade.

   3. Honestly; properly.

            Such means of comfort or even luxury, as lay fairly
            within their grasp.                   --Hawthorne.

   4. Softly; quietly; gently. [Obs.] --Milton.

Source : WordNet®

fairly
     adv 1: to a moderately sufficient extent or degree; "the shoes are
            priced reasonably"; "he is fairly clever with
            computers"; "they lived comfortably within reason"
            [syn: {reasonably}, {moderately}, {within reason}, {somewhat},
             {middling}, {passably}] [ant: {unreasonably}, {unreasonably}]
     2: in a fair evenhanded manner; "deal fairly with one another"
        [syn: {fair}, {without favoring one party}, {without
        favouring one party}, {evenhandedly}]
     3: in conformity with the rules or laws and without fraud or
        cheating; "they played fairly" [syn: {fair}, {clean}]
        [ant: {unfairly}]