1. activities undertaken jointly or together by two or more people or groups
Usage: plural form; often used in educational, organizational, or social contexts

Examples

• The school organized coactivities for students to build teamwork and friendship.
• Coactivities between the two departments helped improve communication and coordination.
• Students participated in various coactivities including sports, music, and community service.
• The summer camp offered coactivities designed to encourage cooperation among campers.
• Coactivities are an important part of the university's student development program.
• Parents and children enjoyed coactivities at the family day event.