1.additional and more than is needed or allowed [lo]
An excess of something is a larger amount than is needed, allowed,or usual. [co]
1) How much is it per kilogram for excess baggage ?
2) The plane circled the airport to burn up excess fuel.
3) You should act quickly to reduce excess stress before it causes problems.
4) Excess storage of green vegetables may result in reduced potencies of vitamins and minerals.
[lo] LONGMAN Advanced AMERICAN DICTIONARY
[co] Collins COBUILD English Dictionary