booster

noun boost·er \ ˈbü-stər \

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

Recent Examples of booster from the Web

Among other things, Lewis told NCAA investigators that an Ole Miss booster delivered $6,800 in cash to him on the day before National Signing Day in 2015.

— creg stephenson, AL.com, "Mississippi State's Leo Lewis reportedly told NCAA he received money from 'multiple' SEC schools," 25 Aug. 2017
This is what's at stake should High School North lose its football team, boosters say.

— jacob bogage, chicagotribune.com, "'The leading edge of a much larger iceberg': New Jersey high school disbands football team," 22 Aug. 2017
Health claims don’t trail far behind: Boosters claim that curcumin, which gives turmeric its bright yellow color, could be a potent drug, too.

— erin blakemore, Washington Post, "What should you make of the health claims for turmeric?," 20 Aug. 2017
Gov. Sam Brownback championed the effort, and he was joined by American Royals booster and interim Cerner chief executive Cliff Illig.

— steve vockrodt, kansascity, "American Royal makes a lofty bet on attendance with move to KCK," 11 Aug. 2017
The Times says Shine’s friendship with Fox News’ biggest Trump booster, Sean Hannity, has helped him get an in with the White House.

— adam k. raymond, Daily Intelligencer, "Report: Former Fox News Exec Bill Shine May Be on His Way to the White House," 1 Aug. 2017
This could help hundreds of millions of children stuck in dismal classes—but only if edtech boosters can resist the temptation to revive harmful ideas about how children learn.

— The Economist, "Education technologyTogether, technology and teachers can revamp schools," 22 July 2017
A health fair from 10 a.m. to 2 p.m. Saturday at Arrowhead Stadium will offer free screenings, body mass index readings and dental checks, as well as tips on car booster seat installation and bicycle safety.

— andy marso, kansascity, "Health fair Saturday at Arrowhead Stadium," 17 July 2017
The Orion spacecraft developed for the Constellation program was retained and NASA eventually won approval to design the heavy lift SLS booster.

— william harwood, CBS News, "Vice President Mike Pence vows to make space program great again," 6 July 2017

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.

First Known Use of booster

1888

booster Synonyms

Synonyms

advocate, advocator, apostle, backer, exponent, champion, expounder, espouser, friend, gospeler (or gospeller), herald, hierophant, high priest, paladin, promoter, proponent, protagonist, supporter, true believer, tub-thumper, white knight

Antonyms

adversary, antagonist, opponent

Related Words

loyalist, partisan (also partizan), stalwart; adherent, cohort, disciple, follower; interpreter; applauder, cheerleader, encourager, fellow traveler

Near Antonyms

enemy, foe, rival; belittler, critic, faultfinder

Medical Dictionary

booster

noun boost·er \ ˈbü-stər \

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 1

a chemical acting as a booster to sulfa drugs

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