ALL meanings of optional
op·tion·al
O o - adjective optional left to one's choice; not required or mandatory: Formal dress is optional. 1
- adjective optional leaving something to choice. 1
- noun optional Available to be chosen but not obligatory. 1
- adjective optional may be chosen 1
- adjective optional feature: can be chosen 1
- adjective optional If something is optional, you can choose whether or not you do it or have it. 0
- adjective optional possible but not compulsory; left to personal choice 0
- adjective optional left to one's option, or choice; not compulsory; elective 0
- adjective optional If something is optional, you can choose whether or not you do it or have it. 0