optional

op·tion·al

adj \ˈäp-shnəl, -shə-n^əl\

Definition of OPTIONAL

: involving an option : not compulsory

— op·tion·al·i·ty \ˌäp-shə-ˈna-lə-tē\ noun

— op·tion·al·ly adverb

Examples of OPTIONAL

1. Jackets are required at the restaurant, but ties are optional.
2. Many optional features are available on this car.
3. Registration is optional, not mandatory.

First Known Use of OPTIONAL

1765

Related to OPTIONAL

Synonyms: discretionary, elective, voluntary

Antonyms: compulsory, mandatory, nonelective, nonvoluntary, obligatory, required

Related Words: alternate, alternative, chosen; dispensable, unnecessary, unneeded, unwanted

Near Antonyms: essential, indispensable, necessary, requisite

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