1. the principle or policy of cooperation among nations, especially in politics or trade
2. the attitude or belief that nations should work together to solve common problems

Examples

• The United Nations represents a commitment to internationalism.
• Her foreign policy views emphasized internationalism over isolationism.
• The treaty reflected the growing spirit of internationalism after the war.
• Economic internationalism has led to increased global trade.
• The organization promotes internationalism through cultural exchange programs.
• Critics argue that excessive internationalism weakens national sovereignty.