—v.i. 1. to make amends or reparation, as for an offense or a crime, or for an offender (usually fol. by for): to atone for one's sins. 2. to make up, as for errors or deficiencies (usually fol. by for): to atone for one's failings. 3. Obs.to become reconciled; agree.
—v.t. 1. to make amends for; expiate: He atoned his sins. 2. Obs.to bring into unity, harmony, concord, etc.