Learner's definition of INTERVENE
to come or occur between two times or events
to become involved in something (such as a conflict) in order to have an influence on what happens
— often + in
to happen as an unrelated event that causes a delay or problem
always used before another noun
praying for divine intervention
This situation called for military intervention.
The program is able to run without intervention by the user.
medical intervention [=treatment]