Etymology
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lucubrate (v.)

1620s, "to work at night," from Latin lucubratus, past participle of lucubrare "work at night, work by lamplight," from the stem of lucere "to shine" (from PIE *louk-eyo-, suffixed (iterative) form of root *leuk- "light, brightness"). Hence "to write or study laboriously" (1804).

updated on May 16, 2021

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Definitions of lucubrate from WordNet

lucubrate (v.)
add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing;
Synonyms: elaborate / expatiate / exposit / enlarge / flesh out / expand / expound / dilate
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.