optional

adjective

op·​tion·​al ˈäp-sh(ə-)nəl How to pronounce optional (audio)
Synonyms of optional
: involving an option : not compulsory
optionality
ˌäp-shə-ˈna-lə-tē How to pronounce optional (audio)
noun
optionally adverb

Synonyms of optional

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Examples of optional in a Sentence

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
An optional trundle addition can double its capacity without taking up more valuable square footage. — Yelena Moroz Alpert, Architectural Digest, 2 Sep. 2026 Mini Domy The Brda has lots of options available, including different interior layouts, an optional deck area, and the ability to swap out the steps for an indoor spiral staircase. — New Atlas, 2 Sep. 2026 The brand added that the toothbrush’s camera feed is strictly live and optional, with no images or video stored on the app or the phone, and no access for the company at any point. — Tianwei Zhang, Footwear News, 1 Sep. 2026 Participating in the yoga session is optional, organizers say. — Pedro Moura, Los Angeles Times, 1 Sep. 2026 See All Example Sentences for optional

Word History

First Known Use

1765, in the meaning defined above

Time Traveler
The first known use of optional was in 1765

Browse Nearby Words

option
optional
optionalize
See all Nearby Words

Cite this Entry

“Optional.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/optional. Accessed 4 Sep. 2026.

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Kids Definition

optional

adjective
op·​tion·​al ˈäp-shnəl How to pronounce optional (audio)
-shən-ᵊl
: left to one's choice : not required
optional equipment on a new car
optionally
-ē
adverb
Last Updated: - Updated example sentences
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