WordReference Random House Learner's Dictionary of American English © 2015
boost /bust/USA pronunciation v. [+ object]
  1. to lift by pushing from below:I boosted the youngster into the top of her bunk bed.
  2. to help (someone) by speaking well of:boosted his friend as likely to win the election.
  3. to increase; raise:to boost prices.

n. [countable]
  • an upward shove or raise;
    lift:gave him a little boost into his highchair.
  • an increase; rise: a boost in prices.
  • an act or remark that helps one's morale, efforts, etc.:After praise from the coach, the whole team felt a boost in morale.


  • Collins Concise English Dictionary © HarperCollins Publishers::

    boost /buːst/ n
    1. encouragement, improvement, or help: a boost to morale
    2. an upward thrust or push
    3. an increase or rise
    4. the amount by which the induction pressure of a supercharged internal-combustion engine exceeds that of the ambient pressure
    vb (transitive)
    1. to encourage, assist, or improve: to boost morale
    2. to lift by giving a push from below or behind
    3. to increase or raise: to boost the voltage in an electrical circuit
    4. to cause to rise; increase: to boost sales
    5. to advertise on a big scale
    6. to increase the induction pressure of (an internal-combustion engine) above that of the ambient pressure; supercharge
    Etymology: 19th Century: of unknown origin



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