nonmodern \nonmodern\ adj. 1. not modern; of or characteristic of an earlier time. Opposite of {modern}. [Narrower terms: {antebellum}; {fogyish, mossgrown, mossy, stick-in-the-mud(prenominal), stodgy old-fashioned}; {medieval, mediaeval, gothic}; {old-time, quaint}; {unmodernized}; {victorian}; {old-fashioned, outmoded}; {old-world}] Also See: {old}, {past}. [WordNet 1.5]