adjective
- available to be chosen but not required; left to one’s choice
Examples
- The final exam is optional for students with an A average.
- Attendance at the meeting is optional.
- The car comes with several optional features like heated seats.
- Dessert is optional with the dinner package.
- Students can take optional courses in art or music.
- The warranty extension is optional but recommended.
- Participation in the survey is completely optional.