A Ferris wheel.
A person with a great deal of power or influence, especially a high-ranking person in an organization.
A low-riding tricycle with a large front wheel.
The literal wheel of a cart.
A gymnastic maneuver whereby the gymnast rotates to one side or the other while keeping arms and legs outstretched, spinning for one or more revolutions.
To perform the gymnastics feat of a cartwheel.
To flip end over end: normally said of a crashing vehicle or aircraft.