Sad

1. (heading) Emotionally negative.
   1. Feeling sorrow; sorrowful, mournful.
   2. Appearing sorrowful.
   3. Causing sorrow; lamentable.
   4. Poor in quality, bad; shameful, deplorable; later, regrettable, poor.
   5. Of colours: dark, deep; later, sombre, dull.
2. (obsolete) Sated, having had one's fill; satisfied, weary.
3. (obsolete) Steadfast, valiant.
4. (obsolete) Dignified, serious, grave.
5. (obsolete) Naughty; troublesome; wicked.
6. (slang) Unfashionable; socially inadequate or undesirable.
7. (dialect) Soggy (to refer to pastries).
8. (obsolete) Heavy; weighty; ponderous; close; hard.

Synonyms

• (feeling mentally uncomfortable): discomforted, distressed, uncomfortable, unhappy
• (low in spirits): depressed, down in the dumps, glum, melancholy
• (moving, full of feeling): poignant, touching
• (causing sorrow): lamentable
• (poor in quality): pitiful, sorry

Antonyms

• happy
• cheerful
• gleeful, upbeat
• decent