Exponent/ɪkˈspəʊnənt/ Definition 1 of 3Pro Tip 1/3Public Advocacy Exponent here means actively and openly supporting a cause, like a public figure. She became a renowned exponent of women's rights. Pro Tip 2/3Not Always Famous An exponent can be any person who declares their support, not necessarily famous. A local teacher might be an exponent of educational reform. Pro Tip 3/3Positive Connotation Using 'exponent' often implies admiration for the person's dedication. Her grandfather was a respected exponent of free speech.