Medical Definition of mental health
1: the condition of being sound mentally and emotionally that is characterized by the absence of mental illness and by adequate adjustment especially as reflected in feeling comfortable about oneself, having positive feelings about others, and being able to meet the demands of daily life; also : the general condition of one's mental and emotional state <Finding the flexibility and balance that is required for good mental health is a challenge we all face.—Christy Turlington, Psychology Today, July/August 2001>
2: health care dealing with the promotion and improvement of mental health and the treatment of mental illness : mental hygiene—often used before another noun <mental health professionals> <a mental health clinic>
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