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  • sad
    sad
    adjective
    affected by unhappiness or grief; sorrowful or mournful.
  • sād
    sād
    noun
    the 14th letter of the Arabic alphabet.
  • SAD
    SAD
    seasonal affective disorder.
Synonyms

sad

1 American  
[sad] / sæd /

adjective

sadder, saddest
  1. affected by unhappiness or grief; sorrowful or mournful.

    to feel sad because a close friend has moved away.

    Synonyms:
    melancholy, dejected, depressed, downhearted, downcast, gloomy, discouraged, disconsolate, despondent, unhappy
    Antonyms:
    happy
  2. expressive of or characterized by sorrow.

    sad looks;

    a sad song.

  3. causing sorrow.

    a sad disappointment;

    sad news.

  4. (of color) somber, dark, or dull; drab.

  5. deplorably bad; sorry.

    a sad attempt.

  6. Obsolete. firm or steadfast.


sād 2 American  
[sahd] / sɑd /

noun

  1. the 14th letter of the Arabic alphabet.


SAD 3 American  
  1. seasonal affective disorder.


sad 1 British  
/ sæd /

adjective

  1. feeling sorrow; unhappy

  2. causing, suggestive, or expressive of such feelings

    a sad story

  3. unfortunate; unsatisfactory; shabby; deplorable

    her clothes were in a sad state

  4. informal ludicrously contemptible; pathetic

    he's a sad, boring little wimp

  5. (of pastry, cakes, etc) not having risen fully; heavy

  6. (of a colour) lacking brightness; dull or dark

  7. archaic serious; grave

"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

verb

  1. to express sadness or displeasure strongly

"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
SAD 2 British  

abbreviation

  1. seasonal affective disorder

"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

Other Word Forms

  • sadly adverb
  • sadness noun

Etymology

Origin of sad1

First recorded before 1000; Middle English; Old English sæd “grave, heavy, weary,” originally “sated, full”; cognate with German satt, Gothic saths “full, satisfied”; akin to Latin satis “enough,” satur “sated,” Greek hádēn “enough.” See satiate, saturate

Origin of sād2

From Arabic

Explanation

When you're sad, you feel unhappy. If you've ever experienced the death of a pet you loved deeply, you know exactly what it means to feel sad. You might use the adjective sad informally to describe something that's pathetic or that you feel scornful or disdainful about. For example, you might comment on your friend's elaborate homemade hat by saying, "That hat is just sad," though it wouldn't be very nice of you to say it. The term "sad sack" became popular during World War II and has been used ever since to refer to an incompetent, slightly pitiful person.

Keep Reading on Vocabulary.com

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.

"I feel very sad that I'm not voting Labour this time," said 59-year-old Ross Mumford, explaining he had always supported the centre-left party, just like his father and grandfather.

From Barron's • May 4, 2026

They also reported feeling more irritable, less engaged, and more likely to perceive the music as sad.

From Science Daily • May 3, 2026

And yet, sad trombone noise: I am definitely not the first nor the last person to observe that Hitler’s arch was a whole lot bigger.

From Salon • May 3, 2026

I was also sad that Redford, who died in September, wasn’t there.

From Los Angeles Times • May 1, 2026

She felt angry and cheated, tricked and stupid, lost and lonely, sad and confused—and the feelings were stronger than the words could say.

From "Nim’s Island" by Wendy Orr