βασίλειος, -ον (also -α, -ον; βασιλεύς),

[in LXX; Exo.19:6, Deu.3:10 (מַמְלָכָה), Exo.23:22, Wis.18:15, 3Ma.3:28, 4Ma.3:8 * ;]

royal: 1Pe.2:9 (LXX) (see Hort, in l.).†

royal, regal, kingly;, metaphorically possessed of high prerogatives and distinction, 1Pet. 2:9; (AS)

royal