Source : Webster's Revised Unabridged Dictionary (1913)

Atone \A*tone"\ ([.a]*t[=o]n"), v. i. [imp. & p. p. {Atoned}; p.
   pr. & vb. n. {Atoning}.] [From at one,, i. e., to be, or
   cause to be, at one. See {At one}.]
   1. To agree; to be in accordance; to accord. [Obs.]

            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.