Meaning & Definition
noun
A reason or explanation.
He had no why for his sudden departure.
A question about the reason for something.
The teacher asked the students to think about the why of their actions.
adverb
For what reason or purpose.
She asked why the meeting was canceled.
Used to introduce a question about the reason for something.
Why did you choose that option?
Used to express a reason or justification.
I don’t know why he reacted that way.
Etymology
Old English 'hwæt', related to the form of question words used in various Germanic languages.
Common Phrases and Expressions
Why not?:
A suggestion or encouragement to consider an option.
Why me?:
A rhetorical question indicating feelings of being singled out, especially for unfavorable reasons.
Asking why:
Inquiring into the rationale behind an action or situation.
Slang Meanings
Why though?
You got a new car? Why though?
Whatcha mean 'why'?
When asked about his decision, he replied, 'Whatcha mean 'why'?'