From Longman Dictionary of Contemporary Englishintervenein‧ter‧vene /ˌɪntəˈviːn $ -tər-/ ●●○ AWL verb 1 DO something/TAKE ACTION[intransitive] to become involved in an argument, fight, or other difficult situation in order to change what happensintervene in The police don’t usually like to intervene in disputes between husbands and wives. The army will have to intervene to prevent further fighting.2 [intransitive, transitive] to interrupt someone when they are speaking ‘Stop shouting, Emily, ’ John intervened.3 STOP something THAT IS HAPPENING[intransitive] if an event intervenes, it delays or interrupts something else He was just establishing his career when the war intervened.4 BETWEEN[intransitive] if a period of time intervenes, it comes between two events In the six years that intervened, I saw them once.→ See Verb table
Examples from the Corpus
intervene• The country was on its way to an economic renewal, but then an earthquake intervened.• The UN has not yet decided whether to intervene militarily.intervene in• So far the high court has refused to intervene in the case.From Longman Business Dictionaryintervenein‧ter‧vene /ˌɪntəˈviːn-tər-/ verb [intransitive] to become involved in a situation in order to help deal with a problemThe Federal Reserve Bank had to intervene to support the dollar (=buy the currency to keep it from falling).intervene inThe government may be forced to intervene in the pay dispute.→ See Verb tableOrigin intervene (1500-1600) Latin intervenire, from venire “to come” 