expression, noun
General term for a state of political hostility without open warfare. Often used metaphorically.
See also: 冷戦
両国は冷たい戦争の状態にある。
The two countries are in a state of cold war.
expression, noun
the Cold War
Specifically refers to the historical Cold War between the US and the Soviet Union.
冷たい戦争は1947年から1991年まで続いた。
The Cold War lasted from 1947 to 1991.