- coincidence, happenstance - an event that might have been arranged although it was really accidental
--1 is a kind of accident, fortuity, chance event
- coincidence - the quality of occupying the same position or area in space; "he waited for the coincidence of the target and the cross hairs"
--2 is a kind of position, spatial relation
- concurrence, coincidence, conjunction, co-occurrence - the temporal property of two things happening at the same time; "the interval determining the coincidence gate is adjustable"
--3 is a kind of simultaneity, simultaneousness
--3 has particulars:concomitance; overlap; contemporaneity, contemporaneousness; unison Derived form: verb coincide2 - concurrence, coincidence, conjunction, co-occurrence - the temporal property of two things happening at the same time; "the interval determining the coincidence gate is adjustable"