The act of replacing one thing with another.

A chemical reaction in which one element or compound replaces another in a compound.

रासायनिक प्रतिस्थापन

English Usage: In a substitution reaction, zinc replaces copper in the solution.

Hindi Usage: एक प्रतिस्थापन प्रतिक्रिया में, जस्ते ने घोल में तांबे का प्रतिस्थापन किया।

To replace one thing with another.

To use something as a replacement for another thing.

किसी चीज का विकल्प बनाना

English Usage: She had to substitute her regular exercise with walking during the recovery period.

Hindi Usage: उसे ठीक होने के दौरान अपने नियमित व्यायाम का विकल्प चलने से बनाना पड़ा।