The term 'Smooth Shift' can be defined by the crossword solution 'SEGUE'. SEGUE is an Italian word meaning 'to follow' and is used to describe a transition from one thing to another. In music, it is used to describe a transition between two pieces of music without any interruption. In film, it is used to describe a smooth transition between two scenes. In literature, it is used to describe a transition between two paragraphs or sections of a book. In general, it is used to describe a smooth transition between two ideas or topics.