English definition of “sad”
/sæd/ adjective (sadder, saddest)
NOT HAPPY › unhappy or making you feel unhappy: I was very sad when our cat died. a sad book/movie [+ that] It's a bit sad that you'll miss our wedding. [+ to do sth] I was sad to see him go.
NOT SATISFACTORY [always before noun] › not pleasant or satisfactory: The sad truth is that we've failed.
NOT FASHIONABLE UK informal › boring or not fashionable: You enjoy reading timetables? You sad man! sadness noun [U] › We could see the sadness in their faces.