not in the least


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not in the least

1. Not at all or in any way. We are not concerned in the least about the impact it may have on our profits this year. A: "Do you mind if I tag along this afternoon?" B: "Not in the least!"
2. Not to a significantly lesser degree. The region has been in turmoil for years, not in the least because of violent political tensions between the two countries.
See also: least, not