Source : Webster's Revised Unabridged Dictionary (1913)

Afield \A*field"\, adv. [Pref. a- + field.]
   1. To, in, or on the field. ``We drove afield.'' --Milton.

            How jocund did they drive their team afield! --Gray.

   2. Out of the way; astray.

            Why should he wander afield at the age of
            fifty-five!                           --Trollope.

Source : WordNet®

afield
     adv 1: far away from home or one's usual surroundings; "looking
            afield for new lands to conquer"- R.A.Hall [syn: {abroad}]
     2: in or into a field (especially a field of battle); "the
        armies were afield, challenging the enemy's advance";
        "unlawful to carry hunting rifles afield until the season
        opens"
     3: off the subject; beyond the point at issue; "such
        digressions can lead us too far afield"