from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Used as a modifier before a noun: my boots; my accomplishments.
- adj. Used preceding various forms of polite, affectionate, or familiar address: My friend, you are so right.
- adj. Used in various interjectional phrases: My word! My goodness!
- interj. Used as an exclamation of surprise, pleasure, or dismay: Oh, my! What a tiring day!
from Wiktionary, Creative Commons Attribution/Share-Alike License
- pro. Belonging to me.
- interj. Used to express surprise, shock or amazement.
from the GNU version of the Collaborative International Dictionary of English
- Of or belonging to me; -- used always attributively; ; -- mine is used in the predicate. See mine.
from The Century Dictionary and Cyclopedia
- Belonging to me: as, this is my book: always used attributively, mine being used for the predicate. Formerly mine was more usual before a vowel, and my before a consonant, but my now stands before both: as, my book; my own book; my eye.
Middle English mi, from Old English mīn. Interj., short for My God!.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English my, apocopated form of min, myn, from Old English mīn ("my, mine"), from Proto-Germanic *mīnaz (“my, mine”, pron.), genitive of Proto-Germanic *ek (“I”). Cognate with West Frisian myn ("my"), Afrikaans my ("my"), Dutch mijn ("my"), German mein ("my"). More at me. (Wiktionary)
An abbreviation of an oath such as my word or my lord (Wiktionary)