Learn the definition of 'excess'. Check out the pronunciation, synonyms and grammar. Browse the use examples 'excess' in the great English corpus. Excess is too much of something, like big-time overindulgence. Eating to excess makes your stomach hurt, and spending to excess means you can't pay your credit card bills. Learn the meaning, pronunciation and usage of the word excess in English. Find out how to use excess as a noun to describe more than is necessary, reasonable or acceptable, or as a part of an insurance claim. The meaning of EXCESS is the state or an instance of surpassing usual, proper, or specified limits : superfluity. How to use excess in a sentence.