Emily Dickinson Lexicon

AD'VERS-A-RY, n. [See Adverse.]

1. An enemy or foe; one who has enmity at heart. The Lord will take vengeance on his adversaries. – Nah. i. In Scripture, Satan is called THE adversary, by way of eminence. – 1 Pet. v.
2. An opponent or antagonist, as in a suit at law, or in single combat; an opposing litigant.