The word
sad refers to an emotional condition; see
sadness or the
sad for more.
The acronym SAD may refer to:
- Sagittal Abdominal Diameter, the diameter around one's waistline
- Schizoaffective disorder, a psychiatric diagnosis with symptoms of a mood disorder and schizophrenia
- Seasonal affective disorder, a mood disorder with depressive symptoms in the winter
- Separation anxiety disorder, a psychological condition related to anxiety of separation from home or from people
- Sexual arousal disorder, the inability to attain or maintain typical responses to sexual arousal
- Selected area diffraction, a crystallographic experimental technique that can be performed inside a transmission electron microscope
- Shiromani Akali Dal, an Indian political party
- Silicon Avalanche Diode, an electronic component
- Singles Awareness Day, a humorous holiday celebrated on February 14
- Small angle diffraction, a technique for analysing materials
- Social anxiety disorder, a diagnosis referring to excessive anxiety in social situations
- Software architecture document, a document for the architecture of computer software
- Special Activities Division, the Central Intelligence Agency's special operations force in the United States
- Standard American Diet, a phrase associated with diet-related obesity in the United States
- Sum of absolute differences, a simple metric for motion estimation in video compression
- Systems Analysis and Design, an interdisciplinary part of science
Sad can also mean: