What is the definition of "Mental Disorder"?

The definition of "Mental Disorder" as a disease or disability of the mind encompasses various psychological conditions characterized by alterations in thinking, mood, or behavior. These disorders can significantly impact daily functioning, and they are recognized within established diagnostic criteria, such as those in the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders). This definition acknowledges that a mental disorder is not simply a transient response to environmental factors or stress (as seen in temporary emotional crises or adjustment issues), but rather a more persistent and diagnosable condition that affects an individual's mental well-being and cognitive functions. This understanding is crucial for professionals dealing with mental health, as it informs the approach to treatment and support for those affected.