April 19,1775 The Battle of Lexington and Concord, which occurred on April 19, 1775, is when the American Revolutionary War began.
mental illness. noun mental illÂ·ness. Legal Definition of mental illness. 1 : mental disease. 2 : a mental condition marked primarily by sufficient disorganization of personality, mind, and emotions to seriously impair the normal psychological and often social functioning of the individual âcalled also mental disorder.
Mental Health Conditions. A mental illness is a condition that impacts a person's thinking, feeling or mood and may affect his or her ability to relate to others and function on a daily basis.