American English

Definition of forewarn verb from the Oxford Advanced American Dictionary



[often passive] forewarn somebody (of something) forewarn somebody that… (formal)Verb Forms present simple I / you / we / they forewarn
he / she / it forewarns
past simple forewarned
-ing form forewarning
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  • to warn someone about something bad or unpleasant before it happens The commander had been forewarned of the attack.
  • Idioms
    forewarned is forearmed (saying)
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    if you know about problems, dangers, etc. before they happen, you can be better prepared for them
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    noun [uncountable, countable]
    See the Oxford Advanced Learner's Dictionary entry: forewarn