optional

Definition

Examples

Attendance at the evening dinner is optional for all staff.

Word Family

Synonyms

• voluntary(military) a person who freely enlists for service
• electivea course that the student can select from among alternatives

Collocations

• Easy optional extra
  describing optional extra (possible but not necessary; left to personal choice)
• Medium attendance is optional
  describing attendance is optional (the act of being present (at a meeting or event etc.))
• Hard optional warranty coverage
  describing optional warranty coverage (possible but not necessary; left to personal choice)
• Very Hard strictly optional clause
  describing strictly optional clause (restricted to something)