co·​e·​ta·​ne·​ous ˌkō-ə-ˈtā-nē-əs How to pronounce coetaneous (audio)
: coeval

Examples of coetaneous in a Sentence

the Spanish founding of San Francisco and the British colonies' declaration of independence from the mother country were coetaneous events that occurred on opposite ends of the continent

Word History


Latin coaetāneus "person of the same age" (from co- co- + aet-, shortened from aetāt-, aetās "age, time of life, lifetime" + -āneus, suffix forming adjectives from temporal words) + -ous — more at age entry 1

Note: Regarding the suffix -āneus see the etymology and note at spontaneous.

First Known Use

1608, in the meaning defined above

Time Traveler
The first known use of coetaneous was in 1608

Dictionary Entries Near coetaneous

Cite this Entry

“Coetaneous.” Dictionary, Merriam-Webster, Accessed 29 Sep. 2023.

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