train of thought
A succession of connected ideas, a path of reasoning, as in You've interrupted my train of thought; now what was I saying? This idiom, which uses train in the sense of “an orderly sequence,” was first recorded in 1651, in philosopher Thomas Hobbes's Leviathan.
Words nearby train of thought
trailing vortex drag,
trailman,
trailside,
trailsman,
train,
train of thought,
train oil,
train sickness,
train smash,
train spotter,
train wreck