See more synonyms for boost on
verb (used with object)
  1. to lift or raise by pushing from behind or below.
  2. to advance or aid by speaking well of; promote: She always boosts her hometown.
  3. to increase; raise: to boost prices; to boost the horsepower of the car by 20 percent.
  4. Slang. to steal, especially to shoplift: Two typewriters were boosted from the office last night.
verb (used without object)
  1. Slang. to engage in stealing, especially shoplifting.
  1. an upward shove or raise; lift.
  2. an increase; rise: There's been a tremendous boost in food prices.
  3. an act, remark, or the like, that helps one's progress, morale, efforts, etc.: His pep talk was the boost our team needed.

Origin of boost

1805–15, Americanism; perhaps Scots dialect boose (variant of pouss push) + (hoi)st

Synonyms for boost

See more synonyms for on Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for boost

Contemporary Examples of boost

Historical Examples of boost

  • Of course, I was expecting something—a boost in salary, or something like that.

    The Fortune Hunter

    Louis Joseph Vance

  • Go easy on stakes because unless careful will boost the comein.

    Mixed Faces

    Roy Norton

  • And since I've left the San, I've looked forward to your letters to boost up my spirits.

    The Straw

    Eugene O'Neill

  • In that case, we will have to turn in and88 give the fellow what you Americans call a boost.

    Wayside Courtships

    Hamlin Garland

  • "Then you'll have to boost the buggy-wheels, that's all," answered Jim.

British Dictionary definitions for boost


  1. encouragement, improvement, or helpa boost to morale
  2. an upward thrust or pushhe gave him a boost over the wall
  3. an increase or risea boost in salary
  4. a publicity campaign; promotion
  5. the amount by which the induction pressure of a supercharged internal-combustion engine exceeds that of the ambient pressure
verb (tr)
  1. to encourage, assist, or improveto boost morale
  2. to lift by giving a push from below or behind
  3. to increase or raiseto boost the voltage in an electrical circuit
  4. to cause to rise; increaseto 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

Word Origin for boost

C19: of unknown origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for boost

1815, literal and figurative, American English, of unknown origin. Related: Boosted; boosting. As a noun by 1825.

Online Etymology Dictionary, © 2010 Douglas Harper

boost in Science


  1. A linear map from one reference frame to another in which each coordinate is increased or decreased by an independent constant or linear function. A boost corresponds to a shift of the entire coordinate system without any rotation of its axes.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.