(1):

(n.) An equitable claim; an equity of redemption; as, an equity to a settlement, or wife's equity, etc.

(2):

(n.) A system of jurisprudence, supplemental to law, properly so called, and complemental of it.

(3):

(n.) Equality of rights; natural justice or right; the giving, or desiring to give, to each man his due, according to reason, and the law of God to man; fairness in determination of conflicting claims; impartiality.