Webster’s Revised Unabridged Dictionary · 1913
Par
Par (pär), n. (Zoöl.) See Parr.
Par, prep. [F., fr. L. per. See Per.] By; with; — used frequently in Early English in phrases taken from the French, being sometimes written as a part of the word which it governs; as, par amour, or paramour; par cas, or parcase; par fay, or parfay.
Par (pär), n. [L. par, adj., equal. See Peer an equal.]
1. Equal value; equality of nominal and actual value; the value expressed on the face or in the words of a certificate of value, as a bond or other commercial paper.
2. Equality of condition or circumstances.
At par, at the original price; neither at a discount nor at a premium. — Above par, at a premium. — Below par, at a discount. — On a par, on a level; in the same condition, circumstances, position, rank, etc.; as, their pretensions are on a par; his ability is on a par with his ambition. — Par of exchange. See under Exchange. — Par value, nominal value; face value.