optional

Part of speech: adverb

OPTIONALLY.

Part of speech: adjective

Depending on choice; elective.

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Usage examples "optional":

  1. In the high schools, except for a one- hour optional course in the High School of Commerce, the subject is developed only incidentally and given no credit. - "What the Schools Teach and Might Teach", John Franklin Bobbitt.
  2. It was optional with me whether I should walk through one hundred and twenty miles of primeval and most impassable forest, or paddle over an equal number of miles of water. - "Hudson Bay", R.M. Ballantyne.
  3. The singer will be wise, however, to avail himself of the power of producing an optional tone with the mechanism of the lower register only on rare occasions. - "The Mechanism of the Human Voice", Emil Behnke.