n.
1.a gymnast who performs rolls and somersaults and twists etc.
2.a glass with a flat bottom but no handle or stem
3.a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown
4.pigeon that executes backward somersaults in flight or on the ground
Idiom of the Day
watch one's step
to act cautiously so that you don't make a mistake or anger someone
You should watch your step when you complain to the manager.