All 6 Uses

coincidence
in
The Fountainhead
(Auto-generated)

It's such a convenient coincidence that he happens to be your father's partner.†
Chpt 2.8 *

coincidence = a situation where things happened at the same time by chance even though it was unlikely
A funny coincidence, wasn't it?†
Chpt 2.11
It's no coincidence at all, my dear.†
Chpt 2.11
Things like that are never a coincidence.†
Chpt 2.11
"No," she whispered, "things like that are never a coincidence."†
Chpt 4.4
Isn't it just the cutest coincidence that it was Mrs. Wynand who just so conveniently sent the watchman away at just the right time?†
Chpt 4.13

Definitions:

(1) (coincidence)
a situation where two things happened at the same time or in the same way by chance even though it was unlikely
(2) (meaning too rare to warrant focus)
Much more rarely coincidence can refer to things coinciding (occurring or operating at the same place or time). For example:
- the coincidence of a target and cross hairs
- the coincidence of entangled particles in quantum physics