A product, especially a book, that sells in very large numbers.

बहुत ज्यादा बिकने वाला उत्पाद

English Usage: "The novel quickly became a best-seller after its release."

Hindi Usage: "उपन्यास अपने रिलीज के बाद जल्दी ही सबसे ज्यादा बिकने वाला बन गया।"

Of the highest quality or standard.

उच्चतम गुणवत्ता या मानक

English Usage: "She is the best student in her class."

Hindi Usage: "वह अपनी कक्षा की सबसे अच्छी छात्रा है।"