<p><strong>Noun</strong></p><ul><li>the air flowing past or through a moving body, as an airplane or automobile.</li><li>the power to float or rise in a fluid; relative lightness.</li><li>the power of supporting a body so that it floats; upward pressure exerted by the fluid in which a body is immersed.</li><li>lightness or resilience of spirit: Student well-being and buoyancy are especially important because of the relatively high incidence of depression and suicide.</li></ul>