the earthly life a person actually lives: its stretch of years, its course, and the way it is spent
Greek had two everyday words for life, and they split the ground between them. ζωή is life itself, the fact of being alive, and the New Testament reaches for it when it speaks of the life God gives and of life that never ends. This word is the other half: not that someone is alive, but the life they actually live, the years they are given and what those years are filled with.
That is why it shows up in two kinds of sentence. Paul asks Timothy to pray that believers may "lead a quiet and peaceable life," where the word is about how a person conducts themselves day by day. Elsewhere it names this present existence as a whole, a world with its own business and pleasures pressing in: the seed choked by "the cares and riches and pleasures of this life," the soldier told not to get tangled in "the affairs of this life."
Because it is life as lived rather than life as gift, this word never becomes a prize in the New Testament. Nobody is promised it and nobody inherits it. It is simply the life a person has on their hands, and the writers are interested in what gets done with it.