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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 house chores included polishing my dad’s shoes and his 1956 Oldsmobile Super 88.

From The Wall Street Journal • Jun. 9, 2026

My goal is always to find a human element that you see yourself in.

From Los Angeles Times • Jun. 9, 2026

My analogy is that it’s a little bit like Immigration and Customs Enforcement.

From Slate • Jun. 9, 2026

My son’s first credit check revealed that his score was in the prime range already thanks to being an authorized user on my card.

From MarketWatch • Jun. 9, 2026

My cell dings and pulls me out of my thoughts of the past.

From "Split the Sky" by Marie Arnold