1. 同时发生的
Coincident events happen at the same time.

2. 相符的;一致的
Coincident opinions, ideas, or policies are the same or are very similar to each other.

1. matching point for point

e.g. coincident circles

2. occurring or operating at the same time

e.g. a series of coincident events

Synonym: coincidentalcoincidingconcurrentco-occurrentcooccurringsimultaneous