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seasonal affective disorder

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noun
  1. recurrent winter depression characterized by oversleeping, overeating, and irritability, and relieved by the arrival of spring or by light therapy. Abbreviation: SAD

Origin of seasonal affective disorder

First recorded in 1980–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for seasonal affective disorder

seasonal affective disorder

noun
  1. a state of depression sometimes experienced by people in winter, thought to be related to lack of sunlightAbbreviation: SAD
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

seasonal affective disorder in Medicine

seasonal affective disorder

(sēzə-nəl)
n.
  1. A mood disorder occurring during seasons when sunlight is limited, characterized by symptoms of depression.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

seasonal affective disorder in Science

seasonal affective disorder

[sēzə-nəl]
  1. A mood disorder that occurs during seasons when exposure to sunlight is limited, characterized by symptoms of depression.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.