Word parts counter- + measure Pronunciation IPA (key): /ˈkaʊntəmɛʒə/ Audio (UK)(file) Noun Singular countermeasure Plural countermeasures (countable) A countermeasure is an action taken to counteract a danger or threat. Chaff and flares are examples of countermeasures.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads