in ‧ ter ‧ ven ‧ tion ‧ ist /ˌɪntəˈvenʃ ə nəst, ˌɪntəˈvenʃ ə nɪst $ -tər-/ BrE AmE adjective
based on the belief of a government or organization that it should take action or spend money to influence the ↑ economy (=financial system) or what happens in other countries
interventionist approach/role/policy
The UN adopted a more interventionist approach in the region.
—interventionism noun [uncountable]