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.
- Nature-study, continued in the secondary schools, is an essential part in the curriculum of these schools, and elementary general history, English, French and German are among the optional subjects.
- For class ~ the prefectural roads were to be from 24 to 30 ft., and the dimensions of the village roads were optional, according to the necessity of the case.
- By the scheme introduced in these memorable terms the course of seven years is divided into two cycles, the first cycle (of four years) having two parallel courses: (1) without Greek or Latin, and (2) with Latin, and with optional Greek at the beginning of the third year.