Webster's English Dictionary

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boost

Cross references:
  1. lift                  
 
1. boost \'bu:st\ vt [origin unknown] 1: to push or shove up from below  
   2a: INCREASE, RAISE  2b: ASSIST, PROMOTE {~ morale}  3: to promote the 
   cause or interests of : PLUG  4: to increase in force, pressure, or amount; 
   esp : to raise the v oltage of or across (an electric circuit)
2. boost n 1: a push upwards  2: an increase in amount  3: an act that 
   brings help or encouragement