lose (one's) train of thought

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lose (one's) train of thought

To be unable to resume one's previous progression of thought. A: "Therefore, it is critical to remember that—" B: "Professor! Will this be on the final exam?" A: "Yes, Stephen. Shoot, now I've lost my train of thought." And so you see, by collecting such data, we can make an inference to the, um… the… What am I trying to say? I lost my train of thought.
See also: lose, of, thought, train

lose one's train of thought

Fig. to forget what one was talking or thinking about. Excuse me, I lost my train of thought. What was I talking about? Your question made the speaker lose her train of thought.
See also: lose, of, thought, train
References in periodicals archive ?
He lost his train of thought completely, desperately tried to recover, but then had to hand back to the anchor man in the studio.
Warnock lost his train of thought when the fan wearing Ralls on his back was brought to his attention, quipping: "He's over there, Joe!" He then turned serious for a second - paying tribute to the families of the squad.
Warnock lost his train of thought when the fan wearing Ralls on his back was brought to his attention, quipping: "He's over there, Joe!" He then turned serious for a second - paying tribute to the families of the squad: "We just want to say that, all the lads here, when we say about being important, all our families are here with us today.
Have you ever wondered what the world would be like if Trump had lost his train of thought that day and instead gone off on a long riff about poor children in Africa and got the same kind of enthusiastic response?
Sometimes there's a man, as the Stranger put it in The Big Lebowski (this was just before he lost his train of thought).
But to so many, that 2011 debate moment when Perry lost his train of thought is an impression tattooed into their minds.
But he lost his train of thought after missing a line on the teleprompter and appeared bemused.
"People were laughing hysterically at the way Noel tore into the idiot in the crowd, but he was part way through the act and admitted he'd lost his train of thought.
Right about now you are probably thinking this dumb, old LDO has lost his train of thought. Surely, he can't draw a parallel between the Department of Navy's traffic fatality rate to the loss of the USS Thresher.
Later in the disease, language and judgment can become impaired.[1] My father often lost his train of thought mid-conversation, had trouble finding the right word or used an obviously wrong word.
Not until then did we become hyphenated into Mexican-Americans." He continued to talk about everything as if he were a walking Chicano Encyclopedia, until some girl broke into our conversation and he lost his train of thought.
He occasionally lost his train of thought, making it difficult for the audience to hang on his every word, even had they wanted to.
In April 1904, while addressing a packed House of Commons, the young politician completely lost his train of thought.