not at all

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not at all

1. (emphatic) Not.
   • 1898, Winston Churchill, chapter 3, in The Celebrity:

     Now all this was very fine, but not at all in keeping with the Celebrity's character as I had come to conceive it. The idea that adulation ever cloyed on him was ludicrous in itself. In fact I thought the whole story fishy, and came very near to saying so.

   He's not at all friendly towards his ex-wife.

• (emphatically: not): by no means, hardly, in no way, not in the least, not in the slightest, not the least bit, not the slightest bit

not at all

1. (idiomatic) Used similarly to you're welcome, as a conventional reply to an expression of gratitude.

   Thank you for this very thoughtful present. — Not at all.

• (conventional reply to expression of gratitude): don't mention it, forget it, it's nothing, no problem, that's all right, that's OK, think nothing of it, you're welcome; see also Thesaurus:you're welcome

• at all