1. joint action or cooperation between two or more parties
Usage: formal
2. compulsion or constraint applied to force action
Usage: legal; formal

Examples

• The treaty required coaction between the neighboring countries to address climate change.
• Successful environmental protection depends on coaction among government agencies.
• The project’s success was due to effective coaction between the research teams.
• Legal coaction was necessary to enforce the new regulations.
• The company used coaction to compel employees to work overtime.
• International coaction is essential for combating global terrorism.