Definition of MODAL. 1. : of or relating to modality in logic. 2. : containing provisions as to the mode of procedure or the manner of taking effect âused of a contract or legacy. 3. : of or relating to a musical mode. 4. : of or relating to structure as opposed to substance. 5.
Pessimism is a temperamental trait, whereas depression is a clinical disease. In some instances, both pessimism and depression might be present, and it might be possible that a consistently negative attitude could lead to depression.
Optimism is a form of positive thinking that includes the belief that you are responsible for your own happiness, and that more good things will continue to happen to you in the future. Learn more about optimism, how it differs from pessimism, and more.