Definition of buoyancy noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈbɔɪənsi//
    ; NAmE NAmE//ˈbɔɪənsi//
    , also NAmE//ˈbuːjənsi//
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  1. 1a tendency for prices, business activity, etc. to increase or stay at a high level, usually showing financial success the buoyancy of the market
  2. 2the feeling of being cheerful and feeling sure that things will be successful a mood of buoyancy
  3. 3the fact of floating, being able to float or able to keep things floating a buoyancy aid (= something to help you float)