at one

prepositional phrase3

1. •
   In harmony or unity.

   • She felt perfectly at one with nature during her retreat to the lake.
2. •
   In agreement, unanimous, of the same opinion.

   • The pastoral deity to whom they paid their devotions was Pales, as to whose sex the ancients themselves were not at one. — 1890
3. •
   (no longer used) Into a state of harmony, friendship or reconciliation.

   • And the next daye he shewed himsilfe unto them as they strove, and wolde have sett them at one agayne saynge: Syrs ye are brethren why hurte ye won another? — 1526