Definify.com
Webster 1913 Edition
Coincidence
Co-in′ci-dence
(kō̍-ĭn′sĭ-dens)
, Noun.
 [Cf. F. 
coïncidence
.] 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 Jefferson3. 
Exact correspondence in nature, character, result, circumstances, etc.; concurrence; agreement. 
The very concurrence and 
coincidence 
of so 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 1828 Edition
Coincidence
COINCIDENCE
, n.1.
  The falling or meeting of two or more lines, surfaces, or bodies in the same point.2.
  Concurrence; consistency; agreement; as the coincidence of two or more opinions; coincidence of evidences.3.
  A meeting of events in time; concurrence; a happening at the same time; as coincidence of events.