booster

noun
boost·​er | \ ˈbü-stər How to pronounce booster (audio) \

Definition of booster

: one that boosts: such as
a : an enthusiastic supporter
b : an auxiliary device for increasing force, power, pressure, or effectiveness
c slang : shoplifter
d : a radio-frequency amplifier for a radio or television receiving set
e : the first stage of a multistage rocket providing thrust for the launching and the initial part of the flight
f : a substance or dose used to renew or increase the effect of a drug or immunizing agent especially : booster shot

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Examples of booster in a Sentence

These exercises are real metabolism boosters. Music is my favorite mood booster. A sincere compliment can be a true confidence booster. The university has a number of wealthy boosters who contribute generously each year. a new design for rocket boosters
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Recent Examples on the Web

Football players at the University of Louisiana are being encouraged to donate to a booster organization that funds the athletic department. BostonGlobe.com, "Dale Earnhardt Jr., family OK after airline crash," 17 Aug. 2019 Sierra Nevada engineers and the company's owners, Fatih and Eren Ozmen, considered boosters built in Japan, Europe and by SpaceX and Blue Origin. William Harwood, CBS News, "Dream Chaser spaceplanes to launch on ULA Vulcan rocket," 14 Aug. 2019 Most of the middle-class people have found private solution to a public service water delivery failure by investing in underground tank and booster pumps. Washington Post, "People, companies forced to save water in parched India city," 13 Aug. 2019 Donor influence can play a role, particularly in sports like golf and tennis where boosters will often build close relationships with coaches. Dan Wolken, USA TODAY, "NCAA's Power 5 schools see steep raise in pay for non-revenue coaches," 12 Aug. 2019 Tyisha Nelson, executive director of special programs for Carroll ISD, noted that her district incorporates information about disability services during parent brown bag lunches, booster meetings and other events. Dallas News, "Does better access to disability accommodations give wealthy schools' kids an edge getting into college?," 9 Aug. 2019 Still, this is the third flight for this booster—which means SpaceX’s cost of providing this free mission is comparatively low. Tim Fernholz, Quartz, "SpaceX delivers a freebie launch today after destroying a satellite in 2016," 6 Aug. 2019 CalWater uses electrical power from PG&E to power its booster pumps, wells, and even their treatment plants for both surface water and groundwater. Robin Epley, The Mercury News, "PG&E power shutoffs affect customers both big and small," 4 Aug. 2019 The Shuttle, designed to be flown frequently and with recoverable, reusable booster engines, was supposed to dramatically lower the cost of transporting people and hardware to low-Earth orbit. Kyle Mizokami, Popular Mechanics, "Everything We Know About the Air Force's Secret X-37B Spaceplane," 30 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'booster.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of booster

1888, in the meaning defined above

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More Definitions for booster

booster

noun

English Language Learners Definition of booster

: an action or substance that makes something stronger or more effective
: something that helps or encourages someone or something
US : someone who supports an idea or organization

booster

noun
boost·​er | \ ˈbü-stər How to pronounce booster (audio) \

Medical Definition of booster

: a substance or dose used to renew or increase the effect of a drug or immunizing agent: such as
a(1) : booster shot
(2) : booster dose
b : synergist sense 1 a chemical acting as a booster to sulfa drugs

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