EXIST definition: 1. to be, or to be real: 2. to live, or to live in difficult conditions: 3. to be, or to be real: . Learn more. exist meaning, definition, what is exist : to happen or be present in a particular ...: Learn more. Master the word " EXIST " in English: definitions, translations, synonyms, pronunciations, examples, and grammar insights - all in one complete resource. Learn the meaning, pronunciation and grammar of the verb exist , which means to be real or present in a place or situation. Find out how to use exist with different prepositions, collocations and expressions.