Oxford has a mobile app for iOS and Android. It costs less than the print book, offers offline search, bookmarks, and word-of-the-day features. This is effectively the “official PDF” you want, but legally and with a better interface.
The is a copyrighted publication by Oxford University Press (OUP). Distributing or downloading unauthorized PDF copies violates intellectual property laws. Free, illegal copies circulating online often contain: Oxford English-english-hindi Dictionary 2nd Edition Pdf --
It includes the International Phonetic Alphabet (IPA) for English words, helping Hindi speakers master difficult English pronunciations. Oxford has a mobile app for iOS and Android