/ Dictionary / Index L lucubrate: Meaning and Definition of Find definitions for: lu•cu•brate Pronunciation: (l'kyoo-brāt"), [key] — -brat•ed, -brat•ing. to work, write, or study laboriously, esp. at night. to write learnedly. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lucubrate (Thesaurus) Lucrezia Borgia* lucubration Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language