Outside a given area or range; out of range (e.g., mobile signal), outside the sphere of influence, or out of contention.
山道に入ると携帯がすぐに圏外になった。
Once we entered the mountain path, our phones immediately went out of range.
今回の選手は決勝進出の圏外だ。
This athlete is out of contention for advancing to the finals.
その国は我が社の影響圏外にある。
That country is outside our company's sphere of influence.