early warning
noun/ˌɜːli ˈwɔːnɪŋ/
/ˌɜːrli ˈwɔːrnɪŋ/
[uncountable, singular]- a thing that tells you in advance that something serious or dangerous is going to happen
- an early warning of heart disease
- an early warning system (= of enemy attack)
- The sensors provide early warning of the approach of enemy troops.
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early warning