weight: how heavy something is, the amount measured out on a scale
This word answers the question "how much does it weigh?" It names the heaviness of a thing as something you could put on a balance and measure, almost always reported in the standard units of the day (shekels and talents of gold, silver, or bronze). When the Bible weighs out the gold for a bride's jewelry, the bronze for the temple, a king's crown, a giant's armor, or a man's yearly tribute, this is the word it reaches for.
A second, closely related use turns from the weight of an object to the act of measuring by weight. To give something out "by weight" is to hand it over carefully measured rather than freely, which is why the same word can carry a note of honest dealing when the law forbids cheating with weights, and a note of scarcity when bread is doled out by weight in a famine. These are not separate words but two angles on one idea: the first names the heaviness itself, the second names the careful weighing of it.
Because biblical economies ran on weighed metal long before stamped coins, weight here is rarely a dry physical fact. It is tied to value, to fairness, and to the worth of precious things, so the word sits at the meeting point of measurement, money, and justice.