Webster 1913 Edition
One who opposes; an opponent; an antagonist; an adversary.
Webster 1828 Edition
1.One that opposes; an opponent in party, in principle, in controversy or argument. We speak of the opposers of public measures; the opposers of ecclesiastical discipline; an opposer of christianity or of orthodoxy.
2.One who acts in opposition; one who resists; as an opposer of law or of the execution of law.
3.An antagonist; an adversary; an enemy; a rival.