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  1. OPTIONAL Definition & Meaning - Merriam-Webster

    Jun 21, 2026 · The meaning of OPTIONAL is involving an option : not compulsory. How to use optional in a sentence.

  2. OPTIONAL | English meaning - Cambridge Dictionary

    OPTIONAL definition: 1. If something is optional, you can choose if you want to do it, pay it, buy it, etc.: 2. If…. Learn more.

  3. OPTIONAL definition and meaning | Collins English Dictionary

    Possible but not compulsory; left to personal choice.... Click for English pronunciations, examples sentences, video.

  4. OPTIONAL | definition in the Cambridge English Dictionary

    OPTIONAL meaning: 1. If something is optional, you can choose if you want to do it, pay it, buy it, etc.: 2. If…. Learn more.

  5. OPTIONAL Synonyms: 20 Similar and Opposite Words - Merriam-Webster

    2 days ago · Synonyms for OPTIONAL: voluntary, elective, discretionary, alternative, unnecessary, chosen, alternate, unwanted; Antonyms of OPTIONAL: mandatory, compulsory ...

  6. std::optional - cppreference.com

    The class template std::optional manages an optional contained value, i.e. a value that may or may not be present. A common use case for optional is the return value of a function that may fail. As …

  7. Optional - definition of optional by The Free Dictionary

    Define optional. optional synonyms, optional pronunciation, optional translation, English dictionary definition of optional. adj. Left to choice; not compulsory or automatic. op′tion·al·ly adv. American …

  8. optional adjective - Definition, pictures, pronunciation and usage ...

    Definition of optional adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

  9. optional Definition & Meaning - Dictionary.net

    The comprehensive definition of optional. Includes pronunciation, synonyms, etymology, and usage examples to help you master this word.

  10. OPTIONAL - Definition & Translations | Collins English Dictionary

    Discover everything about the word "OPTIONAL" in English: meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide.