a hostile situation in which nations attempt to damage each other's trade; a period in which two nations alternate in restricting trade from the other
The tax will make insurance vastly more expensive, destroy jobs, and, quite possibly, start a trade war.
[But] you will start a trade war when you start slapping tariffs on Chinese goods.
A trade war with China is the last thing I want, but I cannot tolerate our current trade surrender.
Up and down England and before cheering crowds he preached the doctrine of trade war to the death on Germany.