If you are sad, you feel unhappy, usually because something has happened that you do not like. The relationship had been important to me and its loss left me feeling sad and empty. I'm sad that Julie's marriage is on the verge of splitting up. I'd grown fond of our little house and felt sad to leave it.
sad (third-person singular simple present sads, present participle sadding, simple past and past participle sadded) (transitive, archaic) To make melancholy; to sadden or grieve (someone). quotations
As an adjective, "sad" primarily refers to feeling or showing unhappiness or sorrow. This is its most common usage, applied to both people and situations. It also describes something that evokes feelings of sadness, such as tragic events or heart-wrenching stories.
feeling unhappiness or grief: to feel sad. expressing or causing sorrow: a sad song. sorry: a sad attempt to make a joke. sad•ly, adv.: She shook her head sadly as she read about the famine. sad (sad), adj., sad•der, sad•dest. sorrowful or mournful: to feel sad because a close friend has moved away.
There are 34 meanings listed in OED's entry for the word sad, 20 of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.
When you're feeling alone, heartbroken or a little blue, read these sad quotes about life and love. Find comfort in these sadness quotes love, loss and pain.