capacity noun

Category: individual differences.
1604, Cawdrey: (capacitie)

largenes of a place: conceit, or receiet.

1626, Cockeram:

aptnes to conceiue, receiue, or hold.

1658, Phillips:

in Common law signifies a right that a King or Clergy-man hath to purchase lands, and is either natural by which he may purchase to him and his heirs, or politick, by which he may purchase to him and his successors.

1676, Coles:

capacity, capability: a being able or fit to do or suffer any thing.