Definition of eternity noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Eternity definition: infinite time; duration without beginning or end.. See examples of ETERNITY used in a sentence. Eternity is time without end, infinite time, or the state of being eternal. Find out the meanings, synonyms, translations, and examples of eternity in different contexts and languages. Eternity is time without an end or a state of existence outside time, especially the state which some people believe they will pass into after they have died. Learn more about the word origin, synonyms, examples, and usage of eternity in British and American English.
