Being irreligious can vary from being actively hostile to indifference about religion, a “not knowing the Lord” (Jdg 2:10). Increasingly modern society considers religion irrelevant, as it moves away from spirituality, believing humanity has or can provide the answers to societies needs. Satan has blinded the spiritual minds of many people and hardened their hearts preventing them from understanding and being converted (2 Cor 4:4). Both atheism (not believing in any god) and agnosticism (doubting the existence of God) are irreligious views.
See also: agnostic, apostasy, atheist, indifference, infidel, spiritual/spirituality.