Source : Webster's Revised Unabridged Dictionary (1913)

Perhaps \Per*haps"\, adv. [Per + hap chance.]
   By chance; peradventure; perchance; it may be.

         And pray God, if perhaps the thought of thine heart may
         be forgiven thee.                        --Acts viii.
                                                  22.

Source : WordNet®

perhaps
     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}, {maybe}, {mayhap},
            {peradventure}]