not at all - Wiktionary, the free dictionary

From Wiktionary, the free dictionary

• (UK)
  • IPA^(key): [ˈnɒtʰəˈtʰɔːɫ]
• (General American)
  • IPA^(key): [ˈnɑɾəˈɾɔɫ]
  • (cot–caught merger)
    • IPA^(key): [ˈnɑɾəˈɾɑɫ]
• (General Australian)
  • IPA^(key): [ˈnɔɾəˈɾoːɫ]

not at all

1. (emphatic) Not even a tiny bit; not in any way.

   Synonyms: by no means, hardly, in no way, not in the least, not in the slightest, not the least bit, not the slightest bit; devil a bit (dated, uncommon)

   Antonyms: a bit, a little bit, somewhat; in a way, to an extent

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

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.

2. (idiomatic) Don't worry about it (response to worry or an apology)

• (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