noun The state of surpassing or going beyond a limit; the state of being beyond sufficiency, necessity, or duty; more than what is usual or proper.
The excess of heavy water was given away to the neighbouring country.
noun The degree or amount by which one thing or number exceeds another; remainder.
The difference between two numbers is the excess of one over the other.
noun An act of eating or drinking more than enough.
noun Spherical excess, the amount by which the sum of the three angles of a spherical triangle exceeds two right angles. The spherical excess is proportional to the area of the triangle.
noun A condition on an insurance policy by which the insured pays for a part of the claim.
adjective More than is normal, necessary or specified.
verb To declare (an employee) surplus to requirements, such that he or she might not be given work.