EXPONENTIAL Meaning of EXPONENTIAL in English [ ˌɛkspə'nɛnʃ(ə)l ]■ adjective1》 (of an increase) becoming more and more rapid. 2》 of or expressed by a mathematical exponent.Derivatives~ly adverb Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004