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optional
adjective
op·tion·al ˈäp-sh(ə-)nəl 
: involving an option : not compulsory
optionally adverb
Synonyms
Example Sentences
Jackets are required at the restaurant, but ties are optional. Many optional features are available on this car. Registration is optional, not mandatory.
Recent Examples on the Web New York City’s subway and bus system decided to make mask wearing optional, and free masks will still be available at subway station booths and on commuter railroad trains. 
Los Angeles Times, 14 Sep. 2022 Most public schools plan to keep masks optional this fall. Jacqueline Howard, CNN, 6 Sep. 2022 Serving in a silver julep cup is fun, but optional. Anna Luisa Rodriguez, Washington Post, 17 Aug. 2022 Power folding second- and third-row seat are optional or standard, depending on trim. Rachel Rothman, Good Housekeeping, 17 Aug. 2022 In Towson, Apple continued the practice, but changed the meetings from mandatory to optional, which would technically comply with the law. Wired, 29 July 2022 The top speed, with the optional 19- or 20-inch wheels, is 165 mph. Michael Harley, Robb Report, 6 July 2022 This week, New York City finally made masks optional for children ages two to four in preschools or daycare facilities. Michael Brendan Dougherty, National Review, 15 June 2022 Many other universities and colleges across Illinois began the semester with face coverings being optional in most indoor areas. Angie Leventis Lourgos, Chicago Tribune, 1 Sep. 2022 See More
Los Angeles Times, 14 Sep. 2022 Most public schools plan to keep masks optional this fall. Jacqueline Howard, CNN, 6 Sep. 2022 Serving in a silver julep cup is fun, but optional. Anna Luisa Rodriguez, Washington Post, 17 Aug. 2022 Power folding second- and third-row seat are optional or standard, depending on trim. Rachel Rothman, Good Housekeeping, 17 Aug. 2022 In Towson, Apple continued the practice, but changed the meetings from mandatory to optional, which would technically comply with the law. Wired, 29 July 2022 The top speed, with the optional 19- or 20-inch wheels, is 165 mph. Michael Harley, Robb Report, 6 July 2022 This week, New York City finally made masks optional for children ages two to four in preschools or daycare facilities. Michael Brendan Dougherty, National Review, 15 June 2022 Many other universities and colleges across Illinois began the semester with face coverings being optional in most indoor areas. Angie Leventis Lourgos, Chicago Tribune, 1 Sep. 2022 See More Word History
First Known Use
1765, in the meaning defined above
Time Traveler
The first known use of optional was in 1765 👨🏻🏫 Mr. Ng 韋氏詞典 📚 – mw.mister5️⃣.net
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