D defs.my
Entry 3 senses Webster, 1913

At one

/ăt wŭn/ · IPA
01 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…
  1. 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. 2.
    Of the same opinion; agreed; as, on these points we are at one.
  3. 3.
    Together.[Obs.]