(scholarly studies) A written commentary which discusses previously produced original work of another author, especially a notable author.

(scholarly studies) An original work, especially one by a notable author whose work is now the subject of commentaries (secondary sources).

A source of power such as a generator or mains outlet.

plural of power source

A measured amount of radioisotope sealed within a protective container.

(US) A hard candy with a sour flavor.

Alternative spelling of source code

plural of sourball

A type of bread dough leavened with yeast and lactobacilli that produce acids giving a sour taste. / (countable, slang) An old-timer, especially in Alaska.

(chiefly US) simple past tense and past participle of source