Feeling sorrow; sorrowful, mournful. / Appearing sorrowful. / Causing sorrow; lamentable. / Poor in quality, bad; shameful, deplorable; later, regrettable, poor.

(transitive, archaic) To make melancholy; to sadden or grieve (someone).

Alternative form of saad (“Arabic letter”)

(medicine) Initialism of seasonal affective disorder. / Initialism of standard American diet. / (US) Initialism of Special Activities Division. / (psychology) Initialism of social anxiety disorder.

(uncountable) The state or emotion of being sad. / (countable) An event in one's life that causes sadness.

present participle of sad

simple past tense and past participle of sad

plural of sadness

(colloquial, only with definite article) Sadness or melancholy

plural of sad (the Arabic letter)