coincidence Meaning, Definition & Usage

  1. noun an event that might have been arranged although it was really accidental
    happenstance.
  2. noun the quality of occupying the same position or area in space
    • he waited for the coincidence of the target and the cross hairs
  3. noun the temporal property of two things happening at the same time
    concurrence; conjunction; co-occurrence.
    • the interval determining the coincidence gate is adjustable

WordNet

Co*in"ci*dence noun
Etymology
Cf. F. coïncidence.
Definitions
  1. The condition of occupying the same place in space; as, the coincidence of circles, surfaces, etc. Bentley.
  2. The condition or fact of happening at the same time; as, the coincidence of the deaths of John Adams and Thomas Jefferson.
  3. Exact correspondence in nature, character, result, circumstances, etc.; concurrence; agreement.
    The very concurrence and coincidence of ao many evidences . . . carries a great weight. Sir M. Hale.
    Those who discourse . . . of the nature of truth . . . affirm a perfect coincidence between truth and goodness. South.

Webster 1913