- The definition of lucubrate is to write or study very hard or to write in an intelligent and learned manner.
When you write and study hard at night, this is an example of a situation where you lucubrate.
intransitive verblu·cu·brat·ed, lu·cu·brat·ing, lu·cu·brates Archaic
Origin of lucubrateLatin lūcubrāre, lūcubrāt-, to work at night by lamplight; see leuk- in Indo-European roots.
(third-person singular simple present lucubrates, present participle lucubrating, simple past and past participle lucubrated)
From Latin lūcubrātus, perfect passive participle of lūcubrō (“work by candlelight”), from lūx (“light”).