A.either, i.e. both of two (opp. ἑκάτερος each one of two), ἀμφοτέρας κοινὸν αἴας common to either land, A.Pers.131; ποίημα ἢ πάθος ἢ ἀμφότερον or partaking of both, Pl.Sph.248d; “τὸ ἀμφότερον ἑκατέρῳ οὐχ ἕπεται” Id.Hp.Ma.302e.
2. Hom. has sg. only neut. ἀμφότερον as Adv., foll. by τε . . καί; ἀ. βασιλεύς τ᾽ ἀγαθὸς κρατερός τ᾽ αἰχμητής both together, prince as well as warrior, ib.3.179; ἀ. γενεῇ τε καὶ οὕνεκα . . Il.4.60; foll. by τε . . δέ . . , Pi.P.4.79: also neut. pl., “ἀμφότερα μένειν πέμπειν τε” A.Eu.480; “φιλοχρήματος καὶ φιλότιμος, ἤτοι τὰ ἕτερα τούτων ἢ ἀ.” Pl.Phd.68c; “ἀ. ἄριστος καὶ στρατηγὸς καὶ ῥαψῳδός” Ion541b; by τε . . καί . . , Pi.O. 1.104.
3. dual in Hom., as “ἀ. Αἴαντε” Il.12.265, al., less freq. in later writers, X.An.1.1.1, Pl.Prm.143c, Isoc.4.134, etc.; but pl. is much more freq., and is found with a dual Noun, “χεῖρε πετάσσας ἀμφοτέρας” Il.21.115.—Phrases: “κατ᾽ ἀμφότερα” on both sides, Hdt.7.10.β́, Pl.Prm.159a; “ἐπ᾽ ἀμφότερα” towards both sides, both ways, Hdt. 3.87, al., Th.1.83, al.; ἀμφότερα, abs., on both sides, ib.13, al.; ἀπ᾽ ἀμφοτέρων from or on both sides, “Ξέρξεω ἀπ᾽ ἀ. ἀδελφεός” Hdt.7.97; “παρ᾽ ἀμφοτέρων” D.S.16.7, al.; μετ᾽ ἀμφοτέροισι one with another (s.v.l.), Theoc.12.12; ἀμφοτέροις βλέπειν (sc. ὄμμασι) Call.Epigr.32.6; ἀμφοτέραις, Ep. -ῃσι (sc. χερσί) Od.10.264; ἐπ᾽ ἀμφοτέροις βεβακώς (sc. ποσί) Theoc.14.66.
II. later, of more than two, all together, Act.Ap.19.16, PLond.2.336.13 (ii A.D.).