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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. 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.

  3. 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

  4. Seasonal affective disorder (SAD) - Mayo Clinic

    2021年12月14日 · 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 often resolve during the spring and summer months.

  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 that Julie's marriage is on the verge of splitting up. I'd grown fond of …

  6. 873 Synonyms & Antonyms for SAD | Thesaurus.com

    Find 873 different ways to say SAD, along with antonyms, related words, and example sentences at Thesaurus.com.

  7. Sad – meaning, definition, etymology, examples and more — Self ...

    2025年3月3日 · Explore the word "sad" in depth. Learn about its etymology, psychological significance, and usage in literature and everyday language.

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

    SAD is a type of depression characterized by a recurrent seasonal pattern, with symptoms lasting about 4−5 months out of the year. The signs and symptoms of SAD include those associated with depression as well as disorder-specific symptoms that …

  9. sad - Wiktionary, the free dictionary

    2025年8月28日 · Woad, or wade, is used by the dyers to lay the foundation of many colours, especially all sad colours.

  10. Sadness - Wikipedia

    Sadness is an emotional pain associated with, or characterized by, feelings of disadvantage, loss, despair, grief, helplessness, disappointment and sorrow. An individual experiencing sadness may become quiet or lethargic, and withdraw themselves from others.