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Definitions

proof

[proof] / pruf /
NOUN
evidence, authentication
Synonyms
STRONGEST
argument clue confirmation criterion data demonstration information picture reason testament testimony validation verification
STRONG
affidavit attestation averment case certification clincher corroboration credentials cue deposition documents establishment exhibit facts goods grabber grounds nitty-gritty reasons record scoop score skinny substantiation trace warrant wherefore why witness
WEAK
chapter and verse lowdown paper trail smoking gun straight stuff whyfor
Antonyms
WEAK
hypothesis theory
NOUN
photographic print
Synonyms
STRONGEST
impression
STRONG
galley pass pull revise stereo trial
WEAK
galley proof page proof repro trial print trial proof
Antonyms
WEAK
hypothesis theory

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Julia Angwin, investigative journalist, founder of Proof News and contributing opinion writer for New York Times.

From Slate • Jan. 30, 2026

Proof of that is in the award show’s history.

From Salon • Jan. 12, 2026

The album will be BTS's first since the anthology "Proof" which became South Korea's bestselling record of 2022.

From Barron's • Jan. 1, 2026

Proof of their potency: Commissioner Marty Makary and his deputy Vinay Prasad devoted much of a recent FDA podcast to mischaracterizing them.

From The Wall Street Journal • Oct. 27, 2025

Proof: I am here to tell you this story.

From "Life of Pi" by Yann Martel

Vocabulary lists containing proof

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The ACT Math Test: Geometry, List 1

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Geometry - Middle School

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