The definition of optional is available, but not required.
If you can choose to add a salad to your dinner but you do not have to add one, this is an example of a time where a salad is optional.
Left to choice; not compulsory or automatic.
- This last is the optional rule of the American Episcopal Church.
- Optional expenditure includes the cost of.
- For while at New College only twenty out of seventy fellows were to study law instead of arts, philosophy and theology, at All Souls College sixteen were to be " jurists " and only twenty-four " artists "; and while at New College there were ten chaplains and three clerks necessarily, at All Souls the number was not defined but left optional; so that there are now only one chaplain and four bible clerks.
- On the i7th of July 1898 a national fund for the insurance of workmen against illness and old age was founded by law on the principle of optional registration.
- The cost of fire brigades, infant asylums, evening and holiday schools, is classed as optional expenditure.