1. In concord or friendship; in agreement (with each other); as, to be, bring, make, or set, at one, i. E, to be or bring in or to a state of agreement or reconciliation. If gentil men, or othere of hir contree Were wrothe, she wolde bringen hem atoon. (Chaucer)
3. Together. He and Aufidius can no more atone Than violentest contrariety. (Shak)
2. To stand as an equivalent; to make reparation, compensation, or amends, for an offense or a crime. The murderer fell, and blood atoned for blood. (Pope) The ministry not atoning for their former conduct by any wise or popular measure. (Junius)
Origin: oe. At on, atone, atoon, attone.