1.Definition: bad; unfortunate
"Her clothes were in sad shape"
2.Definition: 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"
3.Definition: 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"