What is the meaning of Retro?

Of, or relating to, the past, past times, or the way things were.

Affecting things past; retroactive, ex post facto.

Past fashions or trends.

Abbreviation of retrorocket.

Abbreviation of retrospective.

A chess puzzle of retrograde analysis, requiring the solver to work out the history of moves leading to the position presented.

retro style, retro

back

behind

back, rear, reverse

back, backwards, behind

before, formerly

retro (of or relating to the past, past times, or the way things were)

retro

retro

Source: wiktionary.org