An action performed in response to a stimulus.

A person's response to an event or situation.

उत्तेजना के उत्तर में किया गया कार्य

English Usage: The chemical reaction produced a large amount of energy.

Hindi Usage: रासायनिक प्रतिक्रिया ने ऊर्जा की एक बड़ी मात्रा उत्पन्न की।

A feeling or emotion expressed in response to something.

किसी चीज़ के प्रति व्यक्त किया गया भावनात्मक प्रतिक्रिया

English Usage: His reaction showed that he was very pleased.

Hindi Usage: उसकी प्रतिक्रिया ने दिखाया कि वह बहुत खुश था।