booster

US/ˈbustɚ/

booster noun: something that boosts. Also the ellipsis of booster seat.

Noun

booster (plural boosters)

Something that boosts.
- DUBNER: Now, the Children's Hospital of Philadelphia, some officials there, after we published these findings in the New York Times, wrote a letter to the editor, and it said, "Our research consistently shows that child safety seats and booster seats significantly lower the risk of serious injury...2021 January 13, Stephen Joseph Dubner, “How Much Do We Really Care about Children?”, in Freakonomics Radio, Episode 447
The first stage of a multistage rocket, providing primary or supplemental thrust for liftoff and early flight.
A motor-generator set used for voltage regulation in direct current electrical power circuits.
Someone who publicly promotes or endorses (something or someone); a fan or supporter.
- The Pied Piper treats Lowenstein as a metaphor for American post-war liberalism and subjects a once highly regarded political movement to the same scrutiny Lowenstein himself faces. Not too surprisingly, both come out wanting, though their boosters claim otherwise.1985 August 24, Gordon Gottlieb, “CIA-Baiting a Liberal Closet Queen”, in Gay Community News, volume 13, number 7, page 12
- Nor is his district quite the Democratic bastion boosters describe: voters there narrowly backed Barack Obama in 2008, but voted for Mr Bush by a hefty margin in 2004.2012, “Lexington: A fiscal hawk, grounded”, in The Economist
A member of a booster club.
A booster dose.
- When did you get your last tetanus booster?
- In the September vaccine monitor survey from the Kaiser Family Foundation, 71 percent of unvaccinated respondents said the need for boosters indicated that the vaccines were not working.2021 October 11, Jan Hoffman, “Boosters Are Complicating Efforts to Persuade the Unvaccinated to Get Shots”, in The New York Times, →ISSN
(explosives) A small quantity of a sensitive explosive that is triggered by a detonator and provides the energy needed to detonate a larger quantity of a less-sensitive explosive.
A term that serves to amplify or strengthen an utterance, such as "really".
A power-up item.
A package of cards or figurines designed to add to a player's collection.
(slang) A thief.
- The security guard captured two boosters before they could exit the retail store.
A booster engine fitted to a steam locomotive.
- Another notable new series of locomotives, now in course of delivery to the Canadian National Railways, [...]. Fifteen are being built by the Montreal Locomotive Works Limited, and ten by the Canadian Locomotive Company, of Kingston, Ontario; the former are being provided with boosters and the...1941 January, “Recent North American Locomotives”, in Railway Magazine, page 27
- Also in 1939, six 4-8-4s, classified "Kb" because they have boosters, were built at Hillside for service between Christchurch and Arthurs Pass.1954 August, J. B. Snell, “The New Zealand Government Railways—2”, in Railway Magazine, page 561

Verb

booster (third-person singular simple present boosters, present participle boostering, simple past and past participle boostered)

(transitive) To give a booster shot to; to boost.
- "Hey guys, on the first day of our holiday break I tested positive for Covid. I was vaccinated and boostered which made me lucky enough to only have mild symptoms," he wrote beside a photo that showed him sitting alone inside a testing room wearing a mask.2022 January 3, Joelle Goldstein, “Jimmy Fallon Reveals He Tested Positive for COVID: 'I Was Vaccinated and Boostered'”, in People
- What I would prefer over hazard pay would be for every one of our patients to get vaccinated and boostered, as we request constantly. That would be what would make me happy.2022 January 11, Jessica Jacob, “Health Workers, ‘Risking Their Own Lives to Save Ours’”, in The New York Times

Also used as

booster is also the ellipsis of booster seat.

booster meaning in Hindi, Marathi, Urdu and Bengali

booster in Hindi

बूस्टर, बूस्टर करें

booster in Marathi

Something that boosts: वर्धी vardhī
The first stage of a multistage rocket: बूस्टर būsṭar

booster in Urdu

بوسٹر, بوسٹر کریں

booster in Bengali

বুস্টার, বূস্টার

More languagesFewer languages

booster in Telugu: బూస్టర్
booster in Malayalam: ബൂസ്റ്റർ, ബൂസ്റ്റർ ചെയ്യുക
booster in Kannada: ಬೂಸ್ಟರ್
booster in Punjabi: ਬੂਸਟਰ, ਬੁੱਸਟਰ
booster in Gujarati: બૂસ્ટર, બુસ્ટર
booster in Odia: ବୁଷ୍ଟର, ବୁଷ୍ଟର୍, ବୂଷ୍ଟର୍
booster in Nepali: बूस्टर, बुस्टर

Examples of booster in a sentence

The boosters produce an acceleration of 20 metres per second per second.
The game developers of Candy Crush want you to waste large, copious amounts of your money on in-game purchases to buy boosters and lives.
Once the SRBs decelerate following initial main-parachute deployment, the parachutes disreef in stages to gradually slow the boosters to a safe splashdown speed.

All 38 example sentences with booster

Forms of booster

Noun
plural	boosters
Verb
third-person singular present	boosters
present participle	boostering
past participle	boostered
past	boostered

Plural of booster: boosters

Origin of booster

From boost + -er.

Words formed from booster

Phrases with booster

Questions about booster

What does booster mean?: Booster means something that boosts.
What is booster in Hindi?: Booster in Hindi is बूस्टर, बूस्टर करें. See Booster meaning in Hindi.
What part of speech is booster?: Booster can be a noun or a verb.
How do you pronounce booster?: Booster is pronounced /ˈbustɚ/ (US).
What is the plural of booster?: The plural of booster is boosters.

Words near booster in the dictionary

Last updated: 2026-09-02

Pronunciation audio from Wikimedia Commons, each file under its own free license: En-au-booster.ogg.

Cite this entry: “booster.” Word.ws, https://word.ws/booster. Based on Wiktionary, CC BY-SA 4.0.