There are 4 definitions of oh in English:

oh1

Line breaks: oh
Pronunciation: /əʊ
 
/

exclamation

Used to express a range of emotions including surprise, anger, disappointment, or joy, or when reacting to a remark: ‘Oh no,’ said Daisy, appalled Me? Oh, I’m fine oh, shut up
More example sentences
  • Oh no, there's only back seats left!

Origin

mid 16th century: variant of O3.

Phrases

oh yeah?

Used to express disbelief.

Definition of oh in:

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Word of the day animalcule
Pronunciation: ˌanɪˈmalkjuːl
noun
a microscopic animal

There are 4 definitions of oh in English:

oh2

Line breaks: oh

noun

Variant spelling of O1 (sense 2).

Definition of oh in:

There are 4 definitions of oh in English:

OH3

Line breaks: OH

abbreviation

Ohio (in official postal use).

Definition of oh in:

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Word of the day animalcule
Pronunciation: ˌanɪˈmalkjuːl
noun
a microscopic animal

There are 4 definitions of oh in English:

OH4

Line breaks: OH

noun

British informal
A person’s wife, husband, or partner (used in electronic communication): I often go to gigs on my own as my OH doesn’t have the same musical tastes as me
More example sentences
  • Her OH is such a career-driven bloke - he spends 50% of the year working abroad.
  • I know his OH won't want to get involved.
  • I would love my OH to do a healthy diet/exercise regime with me

Origin

1990s: abbreviation of other half.

Definition of oh in:

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Word of the day animalcule
Pronunciation: ˌanɪˈmalkjuːl
noun
a microscopic animal