What does "elective" mean?

Elective: Pertaining to, or consisting in, choice, or right of choosing; electoral. The independent use of their elective franchise. Bancroft.

Additional senses

  1. 2.Dependent on choice; bestowed or passing by election; as, an elective study; an elective office. Kings of Rome were at first elective; . . . for such are the conditions of an elective kingdom. Dryden. Elective affinity or attraction (Chem.), a tendency to unite with certain things; chemism.
  2. 3.In an American college, an optional study or course of study. [Colloq.]

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