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



    BrE BrE//buːst//
    ; NAmE NAmE//buːst//
    [usually singular]
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  1. 1something that helps or encourages somebody/something a great/tremendous/welcome boost The tax cuts will give a much needed boost to the economy. Winning the competition was a wonderful boost for her morale.
  2. 2an increase in something a boost in car sales
  3. 3an increase in power in an engine or a piece of electrical equipment
  4. 4(especially North American English) an act of pushing somebody up from behind He gave her a boost over the fence.
  5. Word Originearly 19th cent. (originally US, in sense (4)): of unknown origin.Extra examples The new factory will provide a much-needed boost to the local economy. a big boost in exports a boost for British products a boost to the economy
See the Oxford Advanced American Dictionary entry: boost

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