fictionary UK /ˈfɪkʃən(ə)ɹi/US /ˈfɪkʃəˌnɛɹi/noun 2adjective 1forms 1 noun2 •A parlor game in which participants invent definitions for an unfamiliar word found in a dictionary, and as one person reads them out, the others try to guess which one is the correct definition.I generally hate playing games, but recently I was introduced to one that I think is actually fun: fictionary. — 2001 •(rare) A dictionary with contrived entries.Daffynitions appear in fictionaries, not dictionaries, and they add hidden dimensions to the words they describe. — 1980 adjective1 •Fictional.Showing a lady into a library in which were alcoves, the books being arranged by subjects, he said, "Now, Miss Mary, I will show you the concave^([sic]) of fictionary novels."' — 1907 formsfictionaries