optional Definition in the Cambridge English Dictionary
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Definition of “optional” - English Dictionary

Definition of "optional" - American English Dictionary

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optionaladjective [not gradable]

 us   /ˈɑp·ʃə·nəl/
not ​necessary or ​demanded but ​possible or ​available; ​depending on what you ​decide to do: I ​thinkmilitaryservice should be ​completely optional.
(Definition of optional from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "optional" - British English Dictionary

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optionaladjective

uk   /ˈɒp.ʃən.əl/  us   /ˈɑːp-/
B2 If something is optional, you can ​choose if you ​want to do it, ​pay it, ​buy it, etc.: English is ​compulsory for all ​students, but ​art and ​music are optional.
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(Definition of optional from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "optional" - Business English Dictionary

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optionaladjective

uk   us   /ˈɒpʃənəl/
COMMERCE something that is optional is something that you can ​buy or do if you want to, but that you do not have to ​buy or do: Optional plug-ins ​cost a further $50 on ​average. optional ​accessories/​components
optional extra COMMERCE, MARKETING something that can be ​added, at ​extracost, to a basic ​product or ​service to make it more attractive, ​efficient, etc.: Some ​carmanufacturersofferadvanced stereo ​systems as an optional ​extra on their more ​expensivemodels.
(Definition of optional from the Cambridge Business English Dictionary © Cambridge University Press)
Translations of “optional”
in Arabic اِخْتياري…
in Korean 선택적인…
in Portuguese opcional…
in Catalan opcional…
in Japanese 任意の, 選択の…
in Chinese (Simplified) 可选择的, 非强制的…
in Turkish tercihli, isteğe bağlı, ihtiyari…
in Russian необязательный, факультативный…
in Chinese (Traditional) 可選擇的, 非強制的…
in Italian facoltativo…
in Polish dodatkowy, dobrowolny…
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