The initialism SAD may refer to: Disorders. Schizoaffective disorder, a psychiatric diagnosis. Social anxiety disorder. Seasonal affective disorder, typically winter depression. Separation anxiety disorder. Organizations. Political or military. Shiromani Akali Dal, a political party in India. Special Activities Division of the US Central Intelligence Agency, now named the Special Activities Center. Saraya Awliya al-Dam, an Iraqi militia. Sports clubs. Sociedad Anónima Deportiva, a type of incorporated sports club in Spain.
https://en.wikipedia.org/wiki/SAD