sad

sad /sd/ adj. (sad•der, sad•dest)
UNHAPPY
1 ~ (to do sth)| ~ (that...) unhappy or showing unhappiness: We are very sad to hear that you are leaving. I was sad that she had to go. She looked sad and tired. I felt terribly sad about it. He gave a slight, sad smile. The divorce left him sadder and wiser (= having learned from the unpleasant experience).
2 ~ (to do sth)| ~ (that ... ) that makes you feel unhappy: a sad story It was sad to see them go. It is sad that so many of his paintings have been lost. We had some sad news yesterday. He’s a sad case—his wife died last year and he can’t seem to manage without her. It will be a sad day for all of us if the theatre is forced to close. Sad to say (= unfortunately) the house has now been demolished.

UNACCEPTABLE
3 unacceptable; deserving blame or criticism deplorable: a sad state of affairs It’s a sad fact that many of those killed were children. It’s a sad reflection on life that it takes danger and suffering to bring people closer together.

BORING
4 (informal) boring or not fashionable: You sad old man. You’d have to be sad to wear a shirt like that.

IN POOR CONDITION
5 in poor condition: The salad consisted of a few leaves of sad-looking lettuce.

—see also sadly, sadness