Source : Webster's Revised Unabridged Dictionary (1913)

Halfway \Half"way`\, adv.
   In the middle; at half the distance; imperfectly; partially;
   as, he halfway yielded.

         Temples proud to meet their gods halfway. --Young.

Halfway \Half"way`\, a.
   Equally distant from the extremes; situated at an
   intermediate point; midway.

   {Halfway covenant}, a practice among the Congregational
      churches of New England, between 1657 and 1662, of
      permitting baptized persons of moral life and orthodox
      faith to enjoy all the privileges of church membership,
      save the partaking of the Lord's Supper. They were also
      allowed to present their children for baptism.

   {Halfway house}, an inn or place of call midway on a journey.

Source : WordNet®

halfway
     adj 1: equally distant from the extremes [syn: {center(a)}, {middle(a)},
             {midway}]
     2: at a point midway between two extremes; "at the halfway
        mark"
     3: including only half or a portion; "halfway measures"
     adv : at half the distance; at the middle; "he was halfway down
           the ladder when he fell" [syn: {midway}]
     [also: {halfways}]