consent or concurrence of opinions or wills; agreement.
8.
an international agreement; settlement of questions outstanding among nations.
Idiom
9.
of one's own accord, without being asked or told; voluntarily: We did the extra work of our own accord.
Origin: 1100–50; Middle English ac(c)corden,late Old English acordan < Old French acorder < Vulgar Latin *accordāre, equivalent to Latin ac-ac- + cord- heart, mind; see cordial, heart
early 12c., from O.Fr. acorder (12c.), from V.L. *accordare "make agree," lit. "be of one heart," from L. ad- "to" + cor (gen. cordis) "heart" (see heart). The noun was M.E. accourd, from O.Fr. acord, a back-formation from acorder.