interestinterestinterests1noun1(no plural) wanting to know or learn about somebody or something: He read the story with interest. He takes no interest in politics.2(pluralinterests) something that you like doing or learning about: His interests are computers and rock music.3(no plural) the extra money that you pay back if you borrow money or that you receive if you put money in a bankinterestinterestinterestsinterestedinteresting2verb (interests, interesting, interested)to make somebody want to know more: Religion doesn't interest her.