Lexical Definition

‎ἀμφότερος‎ amphóteros (am-fot'-er-os) both ^G:A
comparative of (around)

both.

• (in plural) both

Abbott-Smith

ἀμφότεροι, -αι, -α (replaces ἄμφω in κοινή, v. M, Pr., 57; used of more than two, Pr., 80; MM, VGT, s.v.),
both of two: Mt 9:17, al.

Abbott-Smith References

Liddell-Scott-Jones

ἀμφότερος

(Locrian dialect ἀμφόταρος [Refs], α, ον, (ἄμφω) rare in singular, either, i.e. both of two (opposed to ἑκάτερος each one of two), ἀμφοτέρας κοινὸν αἴας common to either land, [Refs 4th c.BC+]; ποίημα ἢ πάθος ἢ ἀμφότερον or partaking of both, [Refs 5th c.BC+]

__2 [Refs 8th c.BC+] as adverb, followed by τε.. κα; ἀ. βασιλεύς τ᾽ ἀγαθὸς κρατερός τ᾽ αἰχμητής both together, prince as well as warrior, [Refs]; ἀ. γενεῇ τε καὶ οὕνεκα.. [Refs 8th c.BC+]; followed by τε.. δέ.., [Refs 5th c.BC+]; by τε.. καί.., [Refs 5th c.BC+]
__3 dual in [Refs 8th c.BC+], less frequently in later writers, [Refs 5th c.BC+]; but plural is much more frequently, and is found with a dual Noun, χεῖρε πετάσσας ἀμφοτέρας[Refs 8th c.BC+] —Phrases: κατ᾽ ἀμφότερα on both sides, [Refs 5th c.BC+]towards both sides, both ways, [Refs 5th c.BC+]; ἀμφότερα, absolutely, on both sides, [Refs]; ἀπ᾽ ἀμφοτέρων from or on both sides, Ξέρξεω ἀπ᾽ ἀ. ἀδελφεός[Refs 5th c.BC+]; μετ᾽ ἀμφοτέροισι one with another (assuming variant), [Refs 3rd c.BC+]; ἀμφοτέροις βλέπειν (i.e. ὄμμασι) [Refs 3rd c.BC+]; ἀμφοτέραις, Epic dialect -ῃσι (i.e. χερσί) [Refs 8th c.BC+]; ἐπ᾽ ἀμφοτέροις βεβακώς (i.e. ποσί) [Refs 3rd c.BC+]
__II later, of more than two, all together, [NT+2nd c.AD+]

_{LSJ Scripture Refs: Acts.19.16}