Standard Lemma guide

booster

noun · verb · 20 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • General-American: /ˈbustɚ/
  • Australia: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: B UW1 S T ER0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

Something that boosts.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Ellipsis of booster seat.

Definition source: English Wiktionary via Wiktextract

Usage: abbreviation, alt-of, ellipsis

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

The first stage of a multistage rocket, providing primary or supplemental thrust for liftoff and early flight.

Definition source: English Wiktionary via Wiktextract

Topics: aerospace, business, engineering, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

A motor-generator set used for voltage regulation in direct current electrical power circuits.

Definition source: English Wiktionary via Wiktextract

Topics: business, electrical, electrical-engineering, electricity, electromagnetism, energy, engineering, natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

Someone who publicly promotes or endorses (something or someone); a fan or supporter.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

A member of a booster club.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

A booster dose.

Definition source: English Wiktionary via Wiktextract

Topics: immunology, medicine, sciences

Examples

  • When did you get your last tetanus booster?

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

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.

Definition source: English Wiktionary via Wiktextract

Qualifier: explosives

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

noun

Meaning 9

A term that serves to amplify or strengthen an utterance, such as "really".

Definition source: English Wiktionary via Wiktextract

Topics: human-sciences, linguistics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

noun

Meaning 10

A power-up item.

Definition source: English Wiktionary via Wiktextract

Topics: video-games

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

noun

Meaning 11

A package of cards or figurines designed to add to a player's collection.

Definition source: English Wiktionary via Wiktextract

Topics: games, gaming

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

12

noun

Meaning 12

A thief.

Definition source: English Wiktionary via Wiktextract

Usage: slang

Examples

  • The security guard captured two boosters before they could exit the retail store.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

13

noun

Meaning 13

A booster engine fitted to a steam locomotive.

Definition source: English Wiktionary via Wiktextract

Topics: rail-transport, railways, transport

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

14

verb

Meaning 14

To give a booster shot to; to boost.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Topics: medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

15

noun

Meaning 15

an additional dose that makes sure the first dose was effective

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: booster dose, booster shot, recall dose

Antonyms: none provided

Broader terms: dose, dosage

16

noun

Meaning 16

the first stage of a multistage rocket

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: booster rocket, booster unit, takeoff booster, takeoff rocket

Antonyms: none provided

Broader terms: rocket, rocket engine

17

noun

Meaning 17

an amplifier for restoring the strength of a transmitted signal

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: booster amplifier, booster station, relay link, relay station, relay transmitter

Antonyms: none provided

Broader terms: amplifier

18

noun

Meaning 18

a thief who steals goods that are in a store

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: shoplifter, lifter

Antonyms: none provided

Broader terms: thief, stealer

19

noun

Meaning 19

someone who is an active supporter and advocate

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: promoter, plugger

Antonyms: none provided

Broader terms: advertiser, advertizer, adman

Narrower terms: barker

20

noun

Meaning 20

a person who backs a politician or a team etc.

Definition source: Princeton WordNet 3.0

Examples

  • all their supporters came out for the game
  • they are friends of the library

Meaning relationships

Synonyms: supporter, protagonist, champion, admirer, friend

Antonyms: none provided

Broader terms: advocate, advocator, proponent, exponent

Narrower terms: anglophile, anglophil, believer, truster, Boswell, cheerleader, Confederate, corporatist, enthusiast, partisan, partizan, Francophile, Francophil, free trader, functionalist, Jacobite, loyalist, stalwart, New Dealer, philhellene, philhellenist, Graecophile, pillar, mainstay, Roundhead, seconder, Shavian, subscriber, endorser, indorser, ratifier, sympathizer, sympathiser, well-wisher, toaster, wassailer, upholder, maintainer, sustainer, voucher, verifier, Whig

History

Etymology

Etymology tree English boost Proto-Indo-European *-yósder. Proto-Italic *-āzios Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English booster From boost + -er.

Across languages

Translations

34 source translations are retained for this English entry.

  • Bulgarian: усилвател (usilvatel) — Something that boosts
  • Esperanto: vigliĝilo — Something that boosts
  • Finnish: kasvattaja — Something that boosts
  • Finnish: kohottaja — Something that boosts
  • German: Unterstützung — Something that boosts
  • Greek: ενίσχυση (eníschysi) — Something that boosts
  • Marathi: वर्धी (vardhī) — Something that boosts
  • Russian: усили́тель (usilítelʹ) — Something that boosts
  • Spanish: refuerzo — Something that boosts
  • Spanish: potenciador — Something that boosts
  • Spanish: búster — Something that boosts
  • Spanish: servofreno — Something that boosts
  • Spanish: adyuvante — Something that boosts
  • Catalan: accelerador — The first stage of a multistage rocket
  • Chinese Mandarin: 助推器 (zhùtuīqì) — The first stage of a multistage rocket
  • Dutch: draagraket — The first stage of a multistage rocket
  • Esperanto: akcela raketo — The first stage of a multistage rocket
  • Finnish: kantoraketti — The first stage of a multistage rocket
  • French: lanceur — The first stage of a multistage rocket
  • German: Booster — The first stage of a multistage rocket
  • Japanese: ブースター (būsutā) — The first stage of a multistage rocket
  • Marathi: बूस्टर (būsṭar) — The first stage of a multistage rocket
  • Polish: rakietowy silnik — The first stage of a multistage rocket
  • Portuguese: foguete reforçador — The first stage of a multistage rocket
  • Portuguese: foguete auxiliar — The first stage of a multistage rocket
  • Russian: раке́та-носи́тель (rakéta-nosítelʹ) — The first stage of a multistage rocket
  • Spanish: propulsor — The first stage of a multistage rocket
  • Welsh: roced hwbio — The first stage of a multistage rocket
  • Bulgarian: привърженик (privǎrženik) — Someone who is a fan or supporter of something
  • Finnish: kannattaja — Someone who is a fan or supporter of something
  • German: Unterstützer — Someone who is a fan or supporter of something
  • Russian: приве́рженец (privérženec) — Someone who is a fan or supporter of something
  • Spanish: aficionado — Someone who is a fan or supporter of something
  • Spanish: seguidor — Someone who is a fan or supporter of something
Real reading context

booster in complete knowledge articles