What does "booster" mean?
Something that boosts.
Booster
/ˈbustɚ/ noun, verb, slang
noun, verb, slang ·Common ·Middle school level
Meaning at a glance
- Primary sense: Something that boosts.
- Grammar: booster is listed as noun, verb, slang.
- Nearest alternatives: booster dose, booster shot, supporter, adherent.
- Useful contrasts: critic, dampener, detractor.
- Usage evidence: You should get a tetanus booster shot once every ten years.
How to use "booster"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "booster" carries the exact meaning, tone, and strength you need.
- Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.
Meaning check
- Does the word fit the sentence's grammar?
- Does it match the intended tone rather than only the dictionary definition?
- Would a simpler synonym be clearer for the reader?
- Is there enough surrounding context to prevent ambiguity?
Source and review context
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "booster" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Before you rely on this definition
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "booster" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "booster" with a nearby alternative so the final choice matches both meaning and reader expectation.
Compare nearby meanings
- Use synonyms when you need a softer, stronger, simpler, or more specific word.
- Use antonyms to check the boundary of the meaning and avoid accidental contrast.
- Use the example sentence to confirm the word behaves naturally in context.
- Keep the original wording when a replacement adds complexity without improving precision.
Definition decision workflow
1. Identify the role
Check whether "booster" is acting as noun, verb, slang in your sentence. A definition is only useful when the grammar matches the way the word is being used.
2. Test the nearest option
Compare it with "booster dose" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.
3. Confirm with context
Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.
Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.
Final meaning check
Before publishing a sentence with "booster", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.
When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
Definitions
Noun
- 1 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 compared to seatbelts alone." They go on to say that your recommendations to rethink car-seat laws are "irresponsible and dangerous"... LEVITT: I think what's irresponsible and dangerous is accepting mediocrity, accepting our existing solutions as if they are the best solution. What I take away from the research is we've put in all of these laws about child car seats and we've built these contraptions but then when you look at the data, they're really not doing better, certainly not much better, than this other invention, which never had kids in mind and shouldn't work at all."
- 2 an additional dose that makes sure the first dose was effective wordnet
- 3 Ellipsis of booster seat. abbreviation, alt-of, ellipsis
- 4 the first stage of a multistage rocket wordnet
- 5 The first stage of a multistage rocket, providing primary or supplemental thrust for liftoff and early flight.
Show 14 more definitions
- 6 an amplifier for restoring the strength of a transmitted signal wordnet
- 7 A motor-generator set used for voltage regulation in direct current electrical power circuits.
- 8 a thief who steals goods that are in a store wordnet
- 9 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."
- 10 someone who is an active supporter and advocate wordnet
- 11 A member of a booster club.
- 12 a person who backs a politician or a team etc. wordnet
- 13 A booster dose.
"When did you get your last tetanus booster?"
- 14 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.
- 15 A term that serves to amplify or strengthen an utterance, such as "really".
- 16 A power-up item.
- 17 A package of cards or figurines designed to add to a player's collection.
- 18 A thief. slang
"The security guard captured two boosters before they could exit the retail store."
- 19 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 latter are not."
Verb
- 1 To give a booster shot to; to boost. transitive
""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."
Synonyms
All synonymsAntonyms
Example
"You should get a tetanus booster shot once every ten years."
Common questions
What is a synonym for "booster"?
Common synonyms include: booster dose, booster shot, supporter, adherent, admirer, admirer.
How do you use "booster" in a sentence?
You should get a tetanus booster shot once every ten years.
How do you pronounce "booster"?
Pronounced /ˈbustɚ/.
Etymology
From boost + -er.