Real Dictionary

my
determiner: A speaker or writer uses my to indicate that something belongs or relates to himself or herself.

My in American English
May
of, belonging to, made by, or done by me
interjection: (used as an exclamation of mild surprise or dismay)
pronoun: (a form of the possessive case of I used as an attributive adjective)

MY in British English
abbreviation for: motor yacht

my in British English 1
determiner: of, belonging to, or associated with the speaker or writer (me)
exclamation: an exclamation of surprise, awe, etc

my in British English 2
the internet domain name for: Malaysia

my- in American English
myo-
combining form

my- in British English
combining form