The Greek noun bios refers to life as lived — biological life, the course of life, livelihood, means of subsistence, or possessions needed for living. It is distinct from zōē (G2222), which denotes life in its spiritual, eternal dimension. Bios is the life you can see, count, and manage; zōē is the life only God can give.
John uses bios pointedly in 1 John: those who have the world's bios and see a brother in need yet close their hearts — how does God's love dwell in them? (1 John 3:17). The parable of the prodigal son uses bios for the inheritance squandered on riotous living (Luke 15:12,30). The widow's bios — all she had to live on — became the most significant offering of all (Mark 12:44). Bios is stewardship territory: how we handle the earthly life entrusted to us reveals what we truly treasure.