Advanced English Word of the Day

Definitions

English > English
optional
1. adj. Not compulsory; left to personal choice; elective.
On that beach clothing is entirely optional.
2. n. Something that is not compulsory, especially part of an academic course.
3. n. (programming) In the Swift programming language, a kind of variable that is assigned a specific data type but may or may not hold an actual value.

Example Sentences

Even though it's optional, you should still do the homework.

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