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3. not for a moment

not for a moment

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not for a moment

not at all; not even for a short amount of time; never. I don't want you to leave. Not for a moment! I could not wish such a horrible punishment on anyone. Not for a moment!

See also: moment, not

not for a moment

Never, not in the least, as in Not for a moment did I believe he was telling the truth. This expression employs moment in the sense of "the tiniest length of time," a usage dating from the mid-1300s.

See also: moment, not