noun
external troubles; foreign threat
Refers to problems or threats originating from outside one's country or group, often used in political or historical contexts. Frequently contrasted with 内憂 (internal troubles).
See also: 内憂
その国は内憂外患に苦しんでいたが、特に外憂への対策が急務だった。
The country was suffering from internal and external troubles, but countermeasures against external threats were particularly urgent.