seasonal affective disorder
Simple Definition of seasonal affective disorder
medical : an illness that makes people feel sad and tired during the winter because there is less light during the day
Full Definition of seasonal affective disorder
: depression that tends to recur as the days grow shorter during the fall and winter —abbreviation SAD
Did You Know?
Seasonal affective disorder hasn't been recognized as a medical condition for very long, and the term has only become part of the general English vocabulary during the past three decades or so (its earliest documented appearance in print dates from 1983). "Seasonal affective disorder" (abbreviated SAD) is also sometimes called "Winter Depression" and some researchers describe it as a "hibernation reaction" in which sensitive individuals react to the decreasing amounts of light and the colder temperatures of fall and winter.
First Known Use of seasonal affective disorder
seasonal affective disorderplay
Medical Definition of seasonal affective disorder
: depression that tends to recur each year chiefly during the late fall and winter and is associated with shorter hours of daylight—abbreviation SAD
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