noun
Common
dunno
DUH-noh
Dunno (noun) means an informal, run-together way of saying "I don't know," used mainly in speech and casual writing. Example: “Where's the remote?" "Dunno, try the sofa.”
noun
1
An informal, run-together way of saying "I don't know," used mainly in speech and casual writing.
""Where's the remote?" "Dunno, try the sofa.""
"I dunno, maybe we should ask someone who has been here before."
"Dunno what she wants for her birthday, do you?"
How to use dunno
Learner’s notesIn plain EnglishA casual, spoken-style shortcut for "I don't know."
When to use it
Very informal — fine in texting or chat, but avoid it in formal writing or professional emails.
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Word forms
- Plural
- dunnos
Fill the gap
Can you complete this real example?
"Where's the remote?" "_____, try the sofa."
Etymology
A written spelling of the slurred pronunciation of "don't know."
Synonyms
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dunno what
not sure
Related words
Frequently asked questions
What does “dunno” mean?
The word “dunno” means an informal, run-together way of saying "I don't know," used mainly in speech and casual writing. In plain terms, a casual, spoken-style shortcut for "I don't know.".
How do you pronounce “dunno”?
“Dunno” is pronounced DUH-noh (/dəˈnoʊ/ in IPA).
How do you use “dunno” in a sentence?
Here is “dunno” used in a sentence: “"Where's the remote?" "Dunno, try the sofa.".”
What part of speech is “dunno”?
“Dunno” is a noun.
Is “dunno” a common word?
“Dunno” is a fairly common word in modern English.
What is the difference between dunno and I don't know?
Dunno is an informal, run-together way of saying "I don't know," used mainly in speech and casual writing. "I don't know" is the standard, fully written form appropriate for formal contexts.
Is dunno appropriate for formal writing?
No. Dunno is informal and should be avoided in formal writing, emails, or professional communication, where "I don't know" or "I am not sure" is preferred.
Is dunno considered a real word?
Dunno is recognized as an informal contraction used mainly in speech and casual writing, though it is not standard in formal grammar and is treated as colloquial rather than a fully standard word.
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