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)
2. Of the same opinion; agreed; as, on these points we are at one.
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.