a train of thought
train of thought
One's uninterrupted progression of thinking. When the phone rang, it derailed my train of thought—I totally forget what I was talking about! Please don't interrupt my train of thought when I'm writing.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
a train of ˈthoughtthe connected series of thoughts that are in your head at a particular time: The phone ringing interrupted my train of thought.
Farlex Partner Idioms Dictionary © Farlex 2017