What is the definition for bouyancy?

Answer 1

Buoyancy is a noun which means the ability or tendency to float in water or air or some other fluid; the power of a liquid to keep something afloat; or an optimistic and cheerful disposition.

Answer 2

Buoyancy is the ability of an object to float in a fluid, such as water or air, due to the upward force exerted by the fluid on the object. It is determined by the object's weight and the density of the fluid. Objects that are less dense than the fluid will float, while objects that are more dense will sink.