The term 'Smooth Change' 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 smooth transition between two pieces of music. In literature, it is used to describe a smooth transition between two ideas or topics. In everyday life, it is used to describe a smooth transition between two activities or conversations. In short, the term 'Smooth Change' can be defined as a transition that is made without interruption or difficulty.