passifan /ˈpæs.ɪˌfæn/ noun1 •(slang, old-fashioned) A fan, particularly of science fiction, who watches and reads the genre but does not actively engage in fanac, or fan activity.Passifan: The "unawakened" Fan, interested now only in reading the magazines and books; not yet participating in any activities. — 1944 formspassifans · passifen