to occupy the same place in space, the same point or period in time, or the same relative position: The centers of concentric circles coincide. Our vacations coincided this year.
2.
to correspond exactly, as in nature, character, etc.: His vocation coincides with his avocation.
3.
to agree or concur, as in thought or opinion: Their opinions always coincide.
Origin: 1635–45; < Medieval Latin coincidere, equivalent to Latin co-co- + incidere to befall; see incident
c.1641, from Fr. coincider (14c.), from M.L. coincidere (in astrological use), from L. co- "together" + incidere "to fall upon" (in- "upon + cadere "to fall;" see case (1)).