Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

454. [Subject of thought] Topic — N. subject of thought, material for

thought; food for the mind, mental pabulum. subject, subject matter; matter, theme, noemata [Gr.], topic, what it is about, thesis, text, business, affair, matter in hand, argument; motion, resolution; head, chapter; case, point; proposition, theorem; field of inquiry; moot point, problem &c (question) 461. V. float in the mind, pass in the mind &c 451. Adj. thought of; uppermost in the mind; in petto. Adv. under consideration; in question, in the mind; on foot, on the carpet, on the docket, on the tapis†; relative to &c 9. SECTION II. PRECURSORY CONDITIONS AND OPERATIONS