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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. Seasonal affective disorder (SAD) - Mayo Clinic

    Dec 14, 2021 · If you're like most people with SAD, your symptoms start in the fall and continue into the winter months, sapping your energy and making you feel moody. These symptoms …

  4. 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.

  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 · Norman Rosenthal uses light in his home to help with depression related to seasonal affective disorder (SAD). Spoiler alert: He has a lot of light boxes.

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

    3 days 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, and Examples sad - usdictionary.com

    May 13, 2025 · As an adjective, "sad" primarily refers to feeling or showing unhappiness or sorrow. This is its most common usage, applied to both people and situations. It also …