'afield' definitions:

Far away from home or one's usual surroundings; "looking afield for new lands to conquer"- R.A.Hall [syn: afield, abroad]

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"

Off the subject; beyond the point at issue; "such digressions can lead us too far afield"