coincidence

noun

1. an event that might have been arranged although it was really accidental

   noun.event

   Synonyms happenstance

   Source: WordNet 3.0

2. the quality of occupying the same position or area in space

   noun.attribute

   Examples

   He waited for the coincidence of the target and the cross hairs.

   Source: WordNet 3.0

3. the temporal property of two things happening at the same time

   noun.attribute

   Examples

   The interval determining the coincidence gate is adjustable.

   Synonyms co-occurrence concurrence conjunction

   Source: WordNet 3.0

4. The condition of occupying the same place in space; as, the <i>coincidence</i> of circles, surfaces, etc.

   noun

   Source: webster1913