Turbulence

Full definition of turbulence

(countable and uncountable; plural turbulences)

(uncountable) The state or fact of being turbulent or agitated; tempestuousness, disturbance.
(uncountable) Disturbance in a gas or fluid, characterized by evidence of internal motion or unrest.
(uncountable) Specifically, a state of agitation or disturbance in the air which is disruptive to an aircraft.
An instance or type of such state or disturbance.