The Webster dictionary defines "Retro" as: relating to, reviving, or being the styles and especially the fashions of the past: fashionably nostalgic or old-fashioned.
Synonyms: antique, oldfangled, old-shcool, old-time, old-world, old-fashioned, retrograde, vintage
Antonyms: contemporary, current, hot, mod, modern, new age, newfangled, new-fashioned, present-day, red-hot, space-age, state-of-the-art, up-to-date.
Origin of "Retro": French, retro, short for retrospective- First known use in 1974.