eschatos

At its core this word marks the end of a line. Whatever comes at the close of a count, a list, or a stretch of time is the last one, set against whatever came first. The New Testament uses it for the final coin a debtor must pay, the youngest son a father sends, the most recent state of a person, and the closing act of a story.

From that plain idea grows the word's heaviest use. Stretched over the whole of history, the last day and the last days name the closing stage of God's plan: the time of resurrection and judgment, the season the prophets pointed toward, the era the first Christians believed they had already entered. The word does not by itself mean the end of the world; it means the final segment, and the context supplies what that final segment contains.

The risen Christ takes the word as a title, calling himself the First and the Last. Paired with first, it claims the two ends of everything: he is there at the beginning and waiting at the end, so nothing falls outside him.

The same word that marks the end of a line can mark the bottom of a ladder. Someone who is last is not merely final in time but lowest in importance, the one with the least claim to honor. This is the sense behind Jesus' repeated reversal: the first will be last and the last first, and whoever wants to be first must become last of all.

The meaning is not about sequence but about status. The workers who grumble are not the latest hired so much as those who feel ranked beneath others; the lowest seat at a banquet is the place of least honor; the apostles paraded as the lowest of all are treated as worthless. Jesus turns this scale upside down, promising that the people the world ranks at the bottom stand first with God.

Applied to distance rather than time or rank, the word names the farthest reach of something. The phrase the end of the earth means the most distant inhabited place, the outer edge of the known world.

Luke uses it to map the spread of the gospel: the witness that begins in Jerusalem is to push out to the farthest point of the earth, and Paul reads the same reach into a promise that salvation will go out to the ends of the world.