The word "retro" derives from the Latin prefix retro, meaning "backwards" or "in past times" -- particularly as seen in the words retrograde, implying a movement toward the past instead of a progress toward the future, and retrospective, referring to a nostalgic (or critical) eye toward the past.
“Retro” can be used to simply mean “old fashioned” or old, functioning much like “timeless” or “classic”. It has also been associated with modernism in the immediate post-war years, encompassing an aesthetic that ranges from tailfins on Cadillacs to ranch houses. Sometimes, it can also suggest an entire outlook on life, for example, social conservatism, home schooling or the embrace of traditional gender roles. “Retro” can also be applied to forms of technological obsolescence, for example, manual typewriters, cash registers, bulky hand-held cell phones, or the resurrection of old computer games. But most commonly, “retro” is used to describe objects and attitudes from the recent past that no longer seem “modern.” It suggests a fundamental shift in the way we relate to the past. Different from more traditional forms of revivalism, “retro” suggests a half ironic, half longing consideration of the recent past. It has been called an “unsentimental nostalgia,” recalling “modern” forms that are no longer current. "Retro" sometimes also refers to the fifties era.
Today it is often used in a positive sense, referring to quirky or attractive products that are no longer available. For example, "Retro fashion" or "Retro Chic" may consist of outdated styles, such as tie-dyed shirts from the 1960s, or poodle skirts from the 1950s. A love of retro objects (things from the past) is called retrophilia.