Meaning of the word optional in English

What does optional mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

optional

US /ˈɑːp.ʃən.əl/
UK /ˈɑːp.ʃən.əl/
"optional" picture

Adjective

1.

available to be chosen but not obligatory

Example:
Attendance at the seminar is optional.
The extended warranty is optional and costs extra.
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