Definition of early warning noun from the Oxford Advanced Learner's Dictionary


early warning

BrE BrE//ˌɜːli ˈwɔːnɪŋ//
; NAmE NAmE//ˌɜːrli ˈwɔːrnɪŋ//
[uncountable, singular]
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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)
See the Oxford Advanced American Dictionary entry: early warning