I.anything projecting, a headland, promontory, Soph.
II.anything put before one, a fence, barrier, screen, Hdt., attic; πρ. σώματος, of a shield, Aesch.; προβλήματα ἵππων χαλκᾶ the brasen armour of horses, Xen.
III.anything put forward as an excuse or screen, Dem.; so, πρ. λαβεῖν τινά (as we say) to make a stalking horse of him, Soph.
IV.that which is proposed, a task, business, Eur.
2.a problem in Geometry, Plat.