From Longman Dictionary of Contemporary Englishtrain of thoughttrain of thoughtTHINK something/HAVE A THOUGHTa related series of thoughts that are developing in your mind The phone interrupted my train of thought. I’ve lost my train of thought. → train
Examples from the Corpus
train of thought• The kettle began to whistle, breaking into her train of thought.• Tunes pulled at the hems of her train of thought.• Some one called out, breaking his train of thought.• Problem Too many phone calls breaking my train of thought.• These are discussed with a clarity which enables the reader to fully identify with the author's train of thought.• The first task attempted will be to trace the train of thought in this unit.• Tracing the train of thought in 6: 12-20 is the task at hand. 