[ loo-kyoo-breyt ]
/ ˈlu kyʊˌbreɪt /

verb (used without object), lu·cu·brat·ed, lu·cu·brat·ing.

to work, write, or study laboriously, especially at night.
to write learnedly.

Origin of lucubrate

1615–25; < Latin lūcubrātus, past participle of lūcubrāre to work by artificial light, equivalent to lūcu-, variant (before labials) of lūci-, combining form of lūcēre to shine + -br(um) instrumental suffix + -ā- theme vowel + -tus past participle suffix

Related forms

lu·cu·bra·tor, nounlu·cu·bra·to·ry [loo-kyoo-bruh-tawr-ee, -tohr-ee] /luˈkyu brəˌtɔr i, -ˌtoʊr i/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for lucubrate


/ (ˈluːkjʊˌbreɪt) /


(intr) to write or study, esp at night

Derived Forms

lucubrator, noun

Word Origin for lucubrate

C17: from Latin lūcubrāre to work by lamplight
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012