Other forms: lucubrated; lucubrating; lucubrates
To lucubrate is to flesh out and add details to something, usually in writing.
Originally, to lucubrate was to work by artificial light, and that meaning should still be helpful in learning this word: when lucubrating, you're shedding new light on a subject by elaborating, expanding, and adding more details. Lucubrating adds clarity and makes a subject easier to understand: it's often associated with scholars.