proof
word
Definition
Proof is information, evidence, or a clear sign that shows something is true. It can also mean a final checked version of a text before printing.
Usage & Nuances
Most often used as an uncountable noun in everyday English: 'Do you have proof?' not usually 'a proof' for evidence. In math and logic, 'a proof' is countable. Common collocations: 'proof of identity', 'proof that...', 'no proof', 'solid proof'. In publishing, 'proof' means a checked pre-print version.
Example Sentences
Do you have any proof that the story is true?
basic
The photo was proof that he was there.
basic
Please check the proof before we print the book.
basic
If they had real proof, they would have shown it by now.
natural
I need proof of identity to open the account.
natural
There’s no proof that the leak came from our team.
natural