There are 2 main definitions of my in English:

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my1

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Pronunciation: /mʌɪ
 
/

possessive determiner

1Belonging to or associated with the speaker: my name is John my friend
1.1 informal Used with a name to refer to a member of the speaker’s family: my Johnny, see, he was smart
2Used in various expressions of surprise: my goodness! oh my!

Origin

Middle English mi (originally before words beginning with any consonant except h-), reduced from min, from Old English mīn (see mine1).

Definition of my in:

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There are 2 main definitions of my in English:

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MY2

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abbreviation

Motor yacht: MY Fleury

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