my (possessive form)
मेरा
English Usage: This is my book.
Hindi Usage: यह मेरी किताब है।
mine
मेरी
English Usage: The red car is mine.
Hindi Usage: लाल कार मेरी है।
my (used before nouns)
English Usage: This is my house.
Hindi Usage: यह मेरा घर है।
of or relating to me
मेरे संदर्भ में
English Usage: My journey was unforgettable.
Hindi Usage: मेरी यात्रा अविस्मरणीय थी।
