slight(redirected from slightest)
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not in the slightest
Not at all; not even a little bit. A: "I'm really sorry. Are you mad?" B: "Not in the slightest! I know it was a mistake."
not have the slightest idea
To not be aware of or know more information about something. A: "Is Sally off today?" B: "Oh, I don't have the slightest idea. Ask Elaine, she'll know."
in the least
Also, in the slightest. At all, in the smallest degree. These terms are nearly always used in a negative context. For example, I don't care in the least what you do with the money, or It doesn't matter in the slightest whether or not you attend. [c. 1600] They may also be put as not in the least or not in the slightest, as in I am not in the least worried about the outcome, or The heat doesn't bother me in the slightest. In the least dates from about 1600; in the slightest has been used in the sense of "emphatically unimportant or trifling" since the late 1500s.
(ˌnot) in the ˈleast(used in negative sentences, questions and if clauses) (not) at all: She wasn’t in the least afraid. ♢ If you are in the least worried about it, then ask somebody for help.
not in the ˈslightestnot at all; not in the least: Flying doesn’t worry me in the slightest.
in the least
At all: I don't mind in the least.