A source of illumination.

(chiefly software) Whose constituent makeup, or source code, is not made publicly available.

(linguistics, translation studies) The language from which a translation is done. / (computing) The language of the source code to be compiled.

(sciences) a source of pollution, radiation, waves, fluid or other substance that has one specific location (and negligible physical extent, distinguishing a point source from other source geometries). In simulations they can often be approximated using mathematical point sources.

plural of source code

(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.

A measured amount of radioisotope sealed within a protective container.

Alternative spelling of closed-source