प्रमाण या सिद्धि (Proof) निम्नलिखित अर्थ म प्रयुक्त हुए सकै छ:

 ऐसनो दलील जे परिपूर्ण (rigorous) आरू वाध्यकारी हो
 प्रमाण (भारतीय दर्शन)
 औपचारिक प्रमाण (Formal proof)
 गणितीय प्रमाण (Mathematical proof)
 सिद्धि सिद्धान्त (Proof theory), a branch of mathematical logic that represents proofs as formal mathematical objects
 तर्कपूर्ण कथन (Logical argument)
 कानूनी साक्ष्य (Evidence)

 विभिन्न प्रकार के जाँच, परीक्षण एवं मापन आदि
 Proofing (baking technique), the process by which a yeast-leavened dough rises, also called “proving”
 Proofreading
 Artist's proof, a single print taken during the printmaking process
 Proof coinage, a coin made as an example of a particular strike
 Proof test, for a firearm
 Homeopathic proving, testing a substance's effect on the body
 Galley proof, a preliminary version of a publication
 Proof (alcohol), a measure of an alcoholic drink’s strength

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