Why-not meaning

Why is that not true?

I don't want to go out today. — Why not?

adverb
2
0
(obsolete) A violent and peremptory procedure without any assigned reason; a sudden conclusive happening.
noun
1
0
Used to state that one has no objection to and approves of a proposal.

Let's have pizza for lunch. — Yes, why not?

adverb
1
0
Used to introduce a proposal.

Why not try turning the handle in the other direction to see if that opens the window?

adverb
1
0
Advertisement