v. t.

  1. 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.

v. i.

  1. To be laid out, used, or consumed.
  2. To pay out or disburse money.