Definition of I don't know
1
—used to say that one does not have the information someone is asking for "What time does the library close?" "I don't know."
2
informal
—used to express disagreement, doubt, or uncertainty "I don't like that guy." "Oh, I don't know, he's not really so bad."She thinks we should go now, but I don't know. Maybe we should wait.
Learn More about I don't know
Statistics for I don't know
Look-up Popularity
Cite this Entry
“I don't know.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/I%20don%27t%20know. Accessed 13 Jun. 2021.
Style: MLA
MLA
Chicago
APA
Merriam-Webster
Chicago
APA
Merriam-Webster
Test Your Vocabulary
Name that Thing: Dog Breeds
-
- Name that dog!
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Spell words. Make bears.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Share I don't know