κλείς, -δός Att.. accusative, κλεῖν, later -εῖδα, pl. κλεῖδες, -ας, contr. -εῖς, ἡ,

[in LXX for מַפְתֵּחַ, Isa.22:22, al. ;]

a key. Fig. τ. βασιλείας τ. οὐρανῶν, Mat.16:19; τ. γνώσεως, Luk.11:52; of David (cf. LXX, l.with), Rev.3:7; τ. θανάτου κ. τ. ᾅδου, Rev.1:18; τ. ἀβύσσαυ, Rev.20:1; τ. φρέατος τῆς ἀ. Rev.9:1.†

(AS)

a key