1. organized series of activities to achieve a particular goal, especially in politics or business
2. series of military operations in a particular area or for a particular purpose

1. works in an organized way toward a particular goal

Examples

• The presidential campaigns began early this year.
• She launched advertising campaigns for several major brands.
• The military campaigns lasted for months.
• Napoleon’s campaigns across Europe changed history.
• He campaigns tirelessly for environmental protection.
• The organization campaigns against animal cruelty.
• Local groups are campaigns for better schools.