Cannabis Sativa October 12, 2016October 12, 2016 thcscience_admin Train of thought is the sequence of thought or speech. The expression may also refer to: Train of Thought (Dream Theater album), 2003 Train of Thought (Reflection Eternal album), 2000 "Train of Thought" (A-ha song), 1986 "Train of Thought" (Cher song), 1974 Train of Thought (Community Arts Tour) Topics referred to by the same term