Definitions of boost:

• noun:   the act of giving hope or support to someone
• noun:   the act of giving an upward push

  Example: "He gave her a boost over the fence"

• noun:   an increase in cost
• verb:   give a boost to; be beneficial to

  Example: "The tax cut will boost the economy"

• verb:   increase or raise

  Example: "Boost the voltage in an electrical circuit"

• verb:   push or shove upward, as if from below or behind

  Example: "The singer had to be boosted onto the stage by a special contraption"

• verb:   contribute to the progress or growth of
• verb:   increase