| 1. | affected by unhappiness or grief; sorrowful or mournful: to feel sad because a close friend has moved away. |
| 2. | expressive of or characterized by sorrow: sad looks; a sad song. |
| 3. | causing sorrow: a sad disappointment; sad news. |
| 4. | (of color) somber, dark, or dull; drab. |
| 5. | deplorably bad; sorry: a sad attempt. |
| 6. | Obsolete. firm or steadfast. |

SAD abbr.
seasonal affective disorder