n. | 1. | The property of floating on the surface of a liquid, or in a fluid, as in the atmosphere; specific lightness, which is inversely as the weight compared with that of an equal volume of water. |
2. | (Physics) The upward pressure exerted upon a floating body by a fluid, which is equal to the weight of the body; hence, also, the weight of a floating body, as measured by the volume of fluid displaced. | |
3. | Cheerfulness; vivacity; liveliness; sprightliness; - the opposite of |
Noun | 1. | buoyancy - cheerfulness that bubbles to the surface Synonyms: perkiness |
2. | buoyancy - the property of something weightless and insubstantial Synonyms: airiness | |
3. | buoyancy - irrepressible liveliness and good spirit; "I admired his bouyancy and persistent good humor" Synonyms: irrepressibility |