To search or examine with continued care; examine into or inquire about diligently.n. Diligent inquiry, examination, or study; laborious or continued search after facts or principles; investigation: as, microscopical research; historical researches.n. In music, an extemporaneous composition preluding the performance of a work, and introducing some of its leading themes.n. Synonyms Investigation, Inquiry, etc. (see examination), exploration.To search again; examine anew.