the most important person in a organization or school

a sum of money lent or invested, on which interest is paid

उधार या निवेश की गई राशि, जिसमें ब्याज दिया जाता है

English Usage: She paid back the principal amount of the loan.

Hindi Usage: उसने ऋण की मुख्य राशि चुकता कर दी।

primary or most important

प्राथमिक या सबसे महत्वपूर्ण

English Usage: The principal reason for the delay was traffic.

Hindi Usage: देरी का मुख्य कारण ट्रैफिक था।