seasonal affective disorder
noun/ˌsiːzənl əˈfektɪv dɪsɔːdə(r)/
/ˌsiːzənl əˈfektɪv dɪsɔːrdər/
[uncountable] (abbreviation SAD)
- a condition in which a person feels sad and tired during late autumn and winter when there is not much light from the sun
在深秋和冬季，阳光照射不多时，人会感到悲伤和疲倦的情况