Health, well-being, wellness, and health promotion are inter-related concepts. “Well-being” is the most comprehensive and was chosen deliberately to express the broad nature of the President’s Council for Well-being work. Definitions that have been adopted for consistent use:

Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity.

Well-being is a dynamic, highly interdependent state that is created at the intersection of health in person, place and planet.

Wellness is the active pursuit of activities, choices and lifestyles that lead to a state of holistic health.

Health promotion is the process of enabling people to increase control over, and to improve, their health. It moves beyond a focus on individual behavior towards a wide range of social and environmental interventions. 

Sources:

Health : World Health Organization, https://www.who.int/about/governance/constitution
Well-being : Definition developed by PCW Executive Committee (2023) guided by the Okanagan Charter 
Wellness : Global Wellness Institute, https://globalwellnessinstitute.org/what-is-wellness/
Health Promotion : World Health Organization, https://www.who.int/westernpacific/about/how-we-work/programmes/health-promotion