Definitions

1. verb

to take action or get involved in a situation in order to change or stop something

“The police had to intervene to prevent a fight from breaking out.”

2. noun

an act or instance of taking action or getting involved in a situation

“The government’s intervention in the economy helped to stabilize the market.”

3. verb

to participate in a meeting or activity

“Several experts will intervene in the conference to discuss the topic.”