Source : Webster's Revised Unabridged Dictionary (1913)

Maybe \May"be\, adv. [For it may be.]
   Perhaps; possibly; peradventure.

         Maybe the amorous count solicits her.    --Shak.

         In a liberal and, maybe, somewhat reckless way.
                                                  --Tylor.

Maybe \May"be\, a.
   Possible; probable, but not sure. [R.]

         Then add those maybe years thou hast to live. --Driden.

Maybe \May"be\, n.
   Possibility; uncertainty. [R.]

         What they offer is mere maybe and shift. --Creech.

Source : WordNet®

maybe
     adv : by chance; "perhaps she will call tomorrow"; "we may
           possibly run into them at the concert"; "it may
           peradventure be thought that there never was such a
           time" [syn: {possibly}, {perchance}, {perhaps}, {mayhap},
            {peradventure}]