Meaning of afield

(adv) far away from home or one's usual surroundings; "looking afield for new lands to conquer"- R.A.Hall

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"