bernoulli principle definition
Definition of BERNOULLI'S PRINCIPLE. : a principle in hydrodynamics: the pressure in a stream of fluid is reduced as the speed of the flow is increased.ADVERTISEMENT.edical Definition of BERNOULLI'S PRINCIPLE. : a principle in hydrodynamics: the pressure in a stream of fluid is reduced as the speed of flow is increased. BerÂ·noulÂ·li's principle also Bernoulli principle. Britannica.com: Encyclopedia article about Bernoulli's principle.