ETYM Greek gymnasths a trainer of athletes: cf. French gymnaste. Related to Gymnasium.
An athlete who is skilled in gymnastics.

1. A glass with a flat bottom but no handle or stem; originally had a round bottom.
2. A gymnast who performs rolls and somersaults and twists etc.
3. A movable obstruction in a lock that must be adjusted to given position (as by a key) before the bolt can be thrown.