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seasonal affective disorder

American  

noun

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

seasonal affective disorder British  

noun

  1.  SAD.  a state of depression sometimes experienced by people in winter, thought to be related to lack of sunlight

"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 Scientific  
/ sē′zə-nəl /

  1. A mood disorder that occurs during seasons when exposure to sunlight is limited, characterized by symptoms of depression.

Etymology

Origin of seasonal affective disorder

First recorded in 1980–85

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Seasonal affective disorder, or SAD, is a type of depression that usually gets worse during the fall and winter.

From Washington Post • Nov. 28, 2021

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.