1New reasoning; a new philosophy or style of reasoning; a fresh theory or approach.
2historical Specifically. Also with capital initials. The reformed foreign policy of the Soviet Union from 1987 until its dissolution in 1991, promoted by Mikhail Gorbachev and characterized by a non-confrontational openness and a willingness to enter into arms control negotiations with the West. Compare "glasnost", "perestroika".
Mid 19th century; earliest use found in William Shedd (1820–1894). From new + thinking.