optional adjective - Definition, pictures, pronunciation and usage notes | Oxford Advanced American Dictionary at OxfordLearnersDictionaries.com

Definition of optional adjective from the Oxford Advanced American Dictionary

optional

adjective

NAmE//ˈɑpʃənl//

that you can choose to do or have if you want to Certain courses are compulsory, others are optional.

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See optional in the Oxford Advanced Learner's Dictionary

Check pronunciation: optional