To sleep lightly or fitfully; especially, to fall into a light sleep unintentionally.To be in a state of drowsiness; be dull or half asleep: as, to doze over a book.Synonyms Drowse, Slumber, etc. See sleep.To pass or spend in drowsiness: as, to doze away one's time.To make dull; overcome as with drowsiness.n. A light sleep; a fitful slumber.