optional

adjective

op·​tion·​al ˈäp-sh(ə-)nəl 

: involving an option : not compulsory

optionality

ˌäp-shə-ˈna-lə-tē 

noun

optionally adverb

Synonyms of optional

• voluntary
• elective
• discretionary

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

Bakkila skipped the brand’s optional white glove delivery, and her king-size mattress arrived in two heavy boxes with the latex layers packaged separately inside a zippered cover for assembly at home. — Nashia Baker, Architectural Digest, 21 Oct. 2026

Complete with an optional Wu-Tang soundtrack, Shaolin Flow lets players choose between traditional flipper-button controls and a more punchy approach. — ArsTechnica, 21 Oct. 2026

Like other clubs, Gollancz expanded its service to additional, supplementary and educational texts, all optional. — Literary Hub, 20 Oct. 2026

Equally noteworthy were the robe coats (belts optional) at Colleen Allen and Calvin Klein, cut in soft shapes for a natural drape. — Andrea Zendejas, Vogue, 20 Oct. 2026

Word History

First Known Use

1765, in the meaning defined above

Kids Definition

optional

adjective

op·​tion·​al ˈäp-shnəl 

-shən-ᵊl

: left to one's choice : not required

optional equipment on a new car

optionally

-ē

adverb