Definition of "under control" in English

Prepositional phrase

1. Being taken care of or being addressed.

   • Don't worry; the police have been called and the situation is under control.

2. Being actively controlled, or able to be actively controlled in its current state.

   • Throughout the turbulence encounter, the pilots kept the aircraft under control.
   • The control rods absorb neutrons in the reactor core, keeping the fission reaction under control and preventing it from going prompt critical.