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Noun: buoyancy  boy-un(t)-see
  1. The tendency to float in water or other liquid
    "The buoyancy of the cork allowed it to bob on the surface of the water"
     
  2. The property of something weightless and insubstantial
    "The buoyancy of her spirits lifted everyone's mood";
    - airiness
     
  3. Cheerfulness that bubbles to the surface
    "Her buoyancy lifted the spirits of everyone in the room";
    - perkiness
     
  4. Irrepressible liveliness and good spirit
    "I admired his buoyancy and persistent good humour";
    - irrepressibility

Derived forms: buoyancies

Type of: blitheness, cheerfulness, inclination, life, lightness, liveliness, spirit, sprightliness, tendency, weightlessness

Encyclopedia: Buoyancy