(1):

(v. i.) To be laid out, used, or consumed.

(2):

(v. t.) To lay out, apply, or employ in any way; to consume by use; to use up or distribute, either in payment or in donations; to spend; as, they expend money for food or in charity; to expend time labor, and thought; to expend hay in feeding cattle, oil in a lamp, water in mechanical operations.

(3):

(v. i.) To pay out or disburse money.