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• my
  my

  pronoun

  (a form of the possessive case of I used as an attributive adjective).
• my-
  my-

  variant of myo- before some vowels.
• MY
  MY

  abbreviation

  motor yacht

my

¹ American  

[mahy] / maɪ /

pronoun

1. (a form of the possessive case of I used as an attributive adjective).

   My soup is cold.

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interjection

1. Also (used as an exclamation of mild surprise or dismay).

   My, what a big house this is! My-my, how old he looks!

my- ² American  

1. variant of myo- before some vowels.

   myalgia.

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my ¹ British  

/ maɪ /

determiner

1. of, belonging to, or associated with the speaker or writer (me)

   my own ideas

   do you mind my smoking?

2. used in various forms of address

   my lord

   my dear boy

3. used in various exclamations

   my goodness!

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interjection

1. an exclamation of surprise, awe, etc

   my, how you've grown!

MY ² British  

abbreviation

1. motor yacht

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my ³ British  

abbreviation

1. Malaysia

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my- ⁴ British  

combining form

1. a variant of myo-

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Grammar

See me.

Usage

What does my- mean? My- is a combining form used like a prefix meaning “muscle.” It is often used in medical terms, especially in anatomy. My- comes from the Greek mŷs, meaning “muscle” and “mouse.” Mouse? You read that right. Discover why at our entry for muscle!My- is a variant of myo-, which loses its -o- when combined with words or word elements beginning with vowels. Want to know more? Read our Words That Use myo- article.

Etymology

Origin of my

First recorded in 1125–75; Middle English mī, variant of mīn, Old English mīn; see mine ¹

Example Sentences

My dentist from a decade ago came through with a picture of a cupcake decked in a sparkler.

From The Wall Street Journal • Jul. 2, 2026

My nephew Randy, who’s one of my managers, he wanted me to take some of the Tijuana Brass records and do a little disco number with them.

From Los Angeles Times • Jul. 2, 2026

Commenting under Smith's Instagram post, award-winning singer-songwriter Raye wrote: "My beautiful superwoman friend."

From BBC • Jul. 2, 2026

Related: ‘She wants him gone’: My friend took in a homeless man as a caretaker.

From MarketWatch • Jul. 2, 2026

My dad texts one of their moms, and she tells him to send her the bill.

From "Split the Sky" by Marie Arnold