a piece of land outside the town: a field, the open country, or the land a person owns there.
At its core this word points to ground that lies beyond the town: land where things grow and where people work, whether that means one worked plot or the whole open countryside. English usually says field, but the word covers more than a single fenced patch.
See how it narrows and widens. It can name a specific field, the ground where a farmer sows seed, where wild flowers and grass grow, or the plot someone buys, such as the burial ground bought with Judas's coins. It can widen to the open country as a whole, the farms and hamlets set against the city, the place people go out to or come in from. And in the plural it can mean a person's lands, the property and estates that count among what someone owns.
The Gospels lean on all of this. Seed falls in the field, flowers of the field outshine a king, workers are out in the field when the end comes, herdsmen run to tell the towns and the countryside, and disciples are promised a hundredfold return on the homes and lands they leave behind.