noun

1. Past fashions or trends.

adjective

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

2. Affecting things past; retroactive, ex post facto.

noun

1. A small rocket engine on a larger rocket or spacecraft, designed to slow or reverse its motion.

Synonyms: retro

noun

1. An exhibition of works from an extended period of an artist's activity.