I.to thrust, push, shove, force onwards or away, λᾶαν ἄνω ὤθεσκε he kept pushing it upwards, Od.; ἀπ᾽ ὀφθαλμῶν νέφος ὦσεν Ἀθήνη Il.; ἐκ μηροῦ δόρυ ὦσε he forced the spear from the thigh, id=Il.; ὦσαί τινα ἀφ᾽ ἵππων id=Il.; ὦσαι ἑαυτὸν ἐς τὸ πῦρ to rush into the fire, Hdt.; so, ὠθ. τινὰ ἐπὶ κεφαλήν to throw him headlong down, Plat.; κατὰ πετρῶν Eur.; ὦσαι τὴν θύραν to force the door, Ar.
2.to push or force back in battle, Il.
II.Mid., mostly in aor1, to thrust or push from oneself, push or force back, repulse, esp. in battle, τείχεος ἂψ ὤσασθαι Il.; ὤσασθαι προτὶ Ἴλιον, προτὶ ἄστυ id=Il.; ὤσασθαι τὴν ἵππον Hdt.; ὠσαμένων τὸ κέρας Thuc.
2.to force one's way, Xen., Plat.: to crowd on, throng, like ὠστίζομαι, Xen.