the act of making something smaller in size, amount, or number

a decrease in a particular quality or quantity

किसी विशेष गुण या मात्रा में गिरावट

English Usage: There was a significant reduction in air pollution after the new regulations were implemented.

Hindi Usage: नई नियमों को लागू करने के बाद वायु प्रदूषण में महत्वपूर्ण कमी आई।