not for one instant

not for one instant

Not for any length of time; not at any point; not at all or in any capacity. Not for one instant did I think this would be a winning ticket, so I was totally gobsmacked to find out I'd won the jackpot! A: "So, did you suspect we were throwing you a surprise party?" B: "No, not for one instant!"
See also: instant, not, one

not for a/one ˈminute/ˈmoment/ˈsecond/ˈinstant

(informal) not at all; definitely not: I didn’t think for a minute that he was married.Not for one instant would I ever consider going there on holiday again.
References in classic literature ?
Cornelius started back in dismay, when in the thief, in the pretended Jacob, he recognised his neighbour, Isaac Boxtel, whom, in the innocence of his heart, he had not for one instant suspected of such a wicked action.
The idea of renewing my labours did not for one instant occur to me; the threat I had heard weighed on my thoughts, but I did not reflect that a voluntary act of mine could avert it.
it, for good or for evil, not for one instant, or in one vicinity, but throughout the entire race, and for all eternity.
Yet the book is not for one instant either mawkish or morbid.