optional

Definitions

Left to one's choice; not compulsory or mandatory.

Available to be chosen but not required.

Examples

Attendance at the workshop is optional, but highly recommended for all staff members.

The software includes an optional feature that allows users to customize their dashboard layout.

Please indicate whether you would like to include the optional insurance coverage with your purchase.

Synonyms

discretionary voluntary elective noncompulsory arbitrary unrestricted selective

Antonyms

mandatory compulsory obligatory required necessary essential compelled