I. To mark, note, or write underneath (cf. subscribo): “in inferiori lineā particulares propositiones subnotentur,” App. Dogm. Plat. 3, p. 31, 27: “nomina palam,” to write down, Suet. Calig. 41.—Transf.: “libellos,” to subscribe, Plin. Ep. 1, 10, 9.—
II. To note secretly, to mark, watch, observe: “et non sobria verba subnotasti,” Mart. 1, 28, 5: “aliquem vultu digitoque,” id. 6, 82, 3.