Definition

1. Interjection:
   • An exclamation expressing various emotions: "oh" is used to express a range of feelings, including surprise, pain, disappointment, understanding, or to introduce a direct address or a response.
   • Used to introduce a remark or to get someone's attention: It can serve as a discourse marker to preface a statement or to call for attention.

Usage Examples

• Expressing surprise, realization, or emotion:
  • Oh! I didn't see you there.
  • Oh, that's a great idea!
  • Oh dear, I think I've lost my keys.
• Expressing pain or discomfort:
  • Oh! That hurt!
• Expressing disappointment or resignation:
  • Oh. I thought you were coming tomorrow.
• Introducing a direct address or a response:
  • Oh, John, could you help me with this?
  • "Are you coming?" "Oh, yes, of course."

Advanced Usage

• "Oh, I see": Used to indicate that one has just understood or realized something.
  • Oh, I see what you mean now.
• "Oh, well": Used to express resignation or acceptance of a situation.
  • Oh, well, we can try again tomorrow.
• "Oh, really?": Used to express interest, skepticism, or surprise about a statement.
  • "He's moving to Japan." "Oh, really?"
• "Oh, boy" / "Oh, man": Informal exclamations expressing strong emotion (e.g., excitement, dismay).
  • Oh, boy, this is going to be fun!
  • Oh, man, I can't believe I forgot.

Variants and Related Words

• O (interjection): An archaic or poetic variant, often used in exclamations (e.g., ). Note: "O" is typically used in direct address without punctuation, while "oh" is used as a general exclamation with punctuation.
• Oh-oh / Uh-oh (interjection): Used to indicate the realization of a mistake or a problem.
  • Uh-oh, I think we're lost.

Synonyms

• Ah: Expresses realization, surprise, or pleasure.
• Wow: Expresses strong surprise or admiration.
• Ouch: Specifically expresses sudden pain.
• Hey: Used to call attention.

Related Phrases

• Oh my God / Oh my gosh / OMG: An exclamation of shock, surprise, or emphasis.
  • Oh my God, look at that view!
• Oh no: An exclamation of dismay, disappointment, or worry.
  • Oh no, I spilled coffee on my shirt.
• Oh yes / Oh yeah: An emphatic affirmation.
  • Oh yes, I remember that day perfectly.

Notes on Different Meanings

• Proper Noun (OH): As a capitalized abbreviation, "OH" most commonly refers to the U.S. state of Ohio. This is a distinct, separate meaning from the interjection "oh."
  • She was born in Columbus, OH.
• The interjection "oh" is distinct from the chemical symbol for the hydroxyl radical (OH⁻) or its use in other acronyms.

Noun

1. a midwestern state in north central United States in the Great Lakes region