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  1. SAD Definition & Meaning - Merriam-Webster

    The meaning of SAD is affected with or expressive of grief or unhappiness : downcast. How to use sad in a sentence.

  2. Seasonal Affective Disorder - National Institute of Mental Health …

    Information about seasonal affective disorder (SAD), a type of depression, including signs and symptoms, how SAD is diagnosed, causes, and treatment options.

  3. SAD | definition in the Cambridge English Dictionary

    SAD meaning: 1. unhappy or sorry: 2. If something looks sad, it looks worse than it should because it is not…. Learn more.

  4. Seasonal affective disorder (SAD) - Symptoms & causes - Mayo Clinic

    Dec 14, 2021 · Seasonal affective disorder (SAD) is a type of depression that's related to changes in seasons — SAD begins and ends at about the same times every year. If you're like most …

  5. SAD definition and meaning | Collins English Dictionary

    If you are sad, you feel unhappy, usually because something has happened that you do not like. The relationship had been important to me and its loss left me feeling sad and empty. I'm sad …

  6. SAD Synonyms: 263 Similar and Opposite Words - Merriam-Webster

    Synonyms for SAD: unhappy, heartbroken, depressed, miserable, sorry, bad, melancholy, upset; Antonyms of SAD: happy, glad, joyous, joyful, cheerful, cheery, jubilant, ecstatic

  7. Seasonal affective disorder - Wikipedia

    Seasonal affective disorder (SAD) is a mood disorder subset in which people who typically have normal mental health throughout most of the year exhibit depressive symptoms at the same …

  8. How the psychiatrist who discovered SAD deals with seasonal …

    Nov 6, 2025 · How to avoid seasonal depression, according to the expert who discovered it Norman Rosenthal uses light in his home to help with seasonal affective disorder. Spoiler …

  9. What is Seasonal Affective Disorder (SAD) and how can it be …

    6 hours ago · What is SAD? SAD stands for Seasonal Affective Disorder and is a form of depression that appears and disappears following a seasonal cycle.

  10. sad Definition & Meaning | Britannica Dictionary

    SAD meaning: 1 : not happy feeling or showing grief or unhappiness; 2 : causing a feeling of grief or unhappiness