adjective

coincident

koh-IN-sih-duhnt/kəʊˈɪnsɪdənt/

Occupying the same point in space or time.

The blue and amber rings are coincident, with centers and edges perfectly aligned.

Two translucent circular rings, one blue and one amber, lie perfectly on top of one another, their centers and edges aligned; an unobtrusive small separated pair at the side makes exact overlap visible without labels.

Etymology

coLatintogether

+inLatinupon

+cidLatinto fall

+entFrenchbeing or doing

The underlying image of “falling upon together” expresses exact correspondence. Applied to time or position, it describes things that occur together or occupy the same place.

In context

Storytime Haven472:41

Then the robberies, coincident with the visit of the yacht, aroused my strong suspicion.

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More examples

The two points are coincident, so they appear as one.
The city boundary is coincident with the river.
Her visit is coincident with our annual family reunion.

Forms

coincident

coincide verb — To occur together in time or position.

Similar words

simultaneous: Means happening at the same time, not sharing a position.
concurrent: Describes events continuing during the same period of time.
overlapping: Allows partial sharing of space or time rather than exact alignment.