* Formal: "The government's intervention in the economy was designed to stimulate growth."
* Informal: "My friends staged an intervention to get me to stop eating so much junk food."
* Medical: "The doctor recommended an early intervention for the child's developmental delays."
* Political: "The international community called for an intervention to stop the humanitarian crisis."
* Personal: "My family's intervention helped me to finally get the help I needed for my addiction."
As you can see, "intervention" can be used in a variety of contexts. It often refers to the act of getting involved in a situation to influence its outcome.