How do you spell Coincidence

Available Definitions:
1)  n. - The condition of occupying the same place in space; as, the coincidence of circles, surfaces, etc.
2)  n. - The condition or fact of happening at the same time; as, the coincidence of the deaths of John Adams and Thomas Jefferson.
3)  n. - Exact correspondence in nature, character, result, circumstances, etc.; concurrence; agreement.