1. the policy or practice of intervening in the affairs of other countries, especially through military action or economic pressure
Usage: often used in political and international relations contexts; can be used descriptively or critically
2. the doctrine or practice of government intervention in economic or social affairs
Usage: economics and political philosophy

Examples

• Critics argue that military interventionism in the region has destabilized local governments.
• The debate over interventionism in foreign policy divides lawmakers along ideological lines.
• Some economists support interventionism to regulate markets and protect workers.
• The country's history of interventionism has made it unpopular with neighboring nations.
• Advocates of interventionism believe governments should actively manage their economies.
• The rise of interventionism during the Great Depression led to new social programs.