optional
Academic Word List, sublist 4.
About 5.61 uses per million words.
Meaning
- adjective Not compulsory; left to personal choice; elective.
On that beach clothing is entirely optional.
- noun Something that is not compulsory, especially part of an academic course.
- noun In various programming languages, a kind of variable that is assigned a specific data type but may or may not hold an actual value.
Similar words
elective facultative ex gratia nonobligatory nonmandatory choice option selective opt voluntary
Often followed by
and protocol with for in clause or extra equipment
Word family
option optionalities optionality optionally options
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