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proof

noun · adjective · verb

Simple meaning

The degree of evidence which convinces the mind of any truth or fact, and produces belief.

Pronunciation

Say it like this:

proof
US device voice
IPA pronunciation (US)

ˈpɹuf

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

  1. uncountable

    The degree of evidence which convinces the mind of any truth or fact, and produces belief; a test by facts or arguments which induce, or tend to induce, certainty of the judgment; conclusive evidence; demonstration.

  2. countable

    An effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial.

  3. US

    A measure of alcoholic strength expressed as an integer twice the percentage of alcohol present (by volume)

  4. The quality or state of having been proved or tried; firmness or hardness which resists impression, or does not yield to force; impenetrability of physical bodies.

  5. us

    A measure of the alcohol content of liquor. Originally, in Britain, 100 proof was defined as 57.1% by volume (no longer used). In the US, 100 proof means that the alcohol content is 50% of the total volume of the liquid; thus, perfectly pure absolute alcohol would be 200 proof.

  6. The 98th sura (chapter) of the Qur'an.

adjective

  1. of alcoholic liquors

    Being of a certain standard as to alcohol content.

  2. Firm or successful in resisting.

verb

  1. Make resistant (to harm)

    “Proof the materials against shrinking in the dryer.”

  2. transitive

    To make resistant, especially to water.

  3. transitiveintransitivecolloquial

    To proofread.

Word at a Glance

Difficulty
A1 · Beginner (estimated)
Frequency
Common
Typical Use
General English

Word Aura™

How this word commonly comes across.

Aura for this meaning

This meaning: The degree of evidence which convinces the mind of any truth or fact, and produces belief; a test by facts or arguments which induce, or tend to induce, certainty of the judgment; conclusive evidence; demonstration.

Used this way, proof 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

Nearby words

  • cogent evidence , rarer, so it draws attention

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

More ways to use proof

  • “If you have any proof for what you say, now is the time to produce it.”noun

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Word Family

Related forms, grouped by how they connect.

Compound terms

Established multiword terms.

  • proof spiritnounCompound term

    A mixture containing half alcohol by volume at 60 degrees Fahrenheit.

  • burden of proofnounCompound term

    The duty of proving a disputed charge.

  • child-proofverbCompound term

    Make safe against children.

  • damp-proof coursenounCompound term

    A course of some impermeable material laid in the foundation walls of building near the ground to prevent dampness from rising into the building.

  • foundry proofnounCompound term

    A proof taken from a form before duplicate plates are made.

  • galley proofnounCompound term

    A proof taken before the type is broken up to print pages.

More about this wordSynonyms, forms, origin

Synonyms

Sense: degree of evidence which convinces the mind of any truth

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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.