Meaning

noun a quantity much larger than is needed

noun immoderation as a consequence of going beyond sufficient or permitted limits

noun the state of being more than full

originFrom Middle English exces (“excess, ecstasy”), from Old French exces, from Latin excessus (“a going out, loss of self-possession”), from excedere, excessum (“to go out, go beyond”). See exceed.

Etymology from Wiktionary, CC BY-SA 3.0