The main or most important means by which information is obtained.

जानकारी का मुख्य स्रोत

English Usage: Books and scholarly articles are often considered the primary source of information in academic research.

Hindi Usage: अकादमिक शोध में किताबें और विद्वत्तापूर्ण लेख अक्सर जानकारी का मुख्य स्रोत माने जाते हैं।