From Longman Dictionary of Contemporary Englishinterventionin‧ter‧ven‧tion /ˌɪntəˈvenʃən $ -tər-/●くろまる●くろまる○しろまるW3AWL noun [countable, uncountable]DO something/TAKE ACTIONthe act of becoming involved in an argument, fight, or other difficultsituation in order to change what happensgovernment intervention to regulate pricesExamples from the Corpusintervention• Earlyintervention can save the lives of many women who get breastcancer.• He opposedU.S. militaryintervention overseas.From Longman Business Dictionaryinterventionin‧ter‧ven‧tion /ˌɪntəˈvenʃən-tər-/ noun [countable, uncountable]the act of becoming involved in a situation in order to help deal with a problemHis financial intervention saved the firm from liquidation.intervention inthe degree of government intervention in the economy