Adjective sad has 3 senses
- sad - experiencing or showing sorrow or unhappiness; "feeling sad because his dog had died"; "Better by far that you should forget and smile / Than that you should remember and be sad"- Christina Rossetti
Antonyms: glad, gladsome, happy, pleased, cheerful
- sad - of things that make you feel sad; "sad news"; "she doesn't like sad movies"; "it was a very sad story"; "When I am dead, my dearest, / Sing no sad songs for me"- Christina Rossetti
Antonym: joyful (indirect, via sorrowful)
- deplorable, distressing, lamentable, pitiful, sad, sorry - bad; unfortunate; "my finances were in a deplorable state"; "a lamentable decision"; "her clothes were in sad shape"; "a sorry state of affairs"
Antonym: good (indirect, via bad)