booster

noun

Simple meaning

Someone who is an active supporter and advocate.

Pronunciation

Say it like this:

booster

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US device voice

IPA pronunciation (US)

ˈbustɚ

This word is pronounced essentially the same in American and British English, so one transcription covers both.

IPA (International Phonetic Alphabet) is a standard way of writing speech sounds.

Word Review

Definition

Everyday modern meanings first, grouped by part of speech.

noun

Someone who is an active supporter and advocate
Someone who publicly promotes or endorses (something or someone); a fan or supporter.
immunology
An additional dose that makes sure the first dose was effective
A member of a booster club.

Word at a Glance

Difficulty: B1 · Intermediate (estimated)
Frequency: Moderately Common
Typical Use: Neutral / general English

Word Aura™

How this word commonly comes across.

Aura for this meaning

This meaning: Someone who is an active supporter and advocate

Used this way, booster is a reasonably familiar word that usually carries little praise or criticism of its own. It usually sounds natural in a wide range of settings.

Emotional tone: Neutral
Formality: Neutral
Intensity: Not strongly marked
How common: Moderately common
Connotation: Matter-of-fact
Usage feel: Neutral and straightforward

Word Aura describes common impressions, not a measurement. Tone changes with sentence, speaker, relationship and situation.

Common Patterns and Combinations

How this word naturally appears with others.

Small

booster seat

Additional

booster dose

Other combinations

booster pumpbooster shotrocket boosterbooster clubbrake boosterbooster injection

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Similar Words, What’s the Difference?

Close in meaning, but not always interchangeable.

promoter
Someone who is an active supporter and advocate.
friend
A person who backs or supports something.
supporter
A person who gives support to someone or something.

Word Family

Related forms, grouped by how they connect.

Inflected forms

Grammatical variations of the same word.

boostverbBase word
Increase.

Compound terms

Established multiword terms.

booster amplifiernounCompound term
An amplifier for restoring the strength of a transmitted signal.
booster cablenounCompound term
A jumper that consists of a short piece of wire.
booster dosenounCompound term
An additional dose that makes sure the first dose was effective.
booster rocketnounCompound term
The first stage of a multistage rocket.
booster shotnounCompound term
An additional dose that makes sure the first dose was effective.
booster stationnounCompound term
An amplifier for restoring the strength of a transmitted signal.

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Dictionary data from Wiktionary via the Free Dictionary API. Simple meanings, combinations and word intelligence are built from verified reference data, no AI is used to load this page.