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

For solo diners, phone-free meals, unhurried pacing and intentional atmosphere can become part of the experience rather than optional extras. — Ashley Lynch, Fort Worth Star-Telegram, 14 Oct. 2026

This being Dodge, of course, the AWD is optional and can be shut off at will when the driver prefers rear-wheel madness. — New Atlas, 14 Oct. 2026

Plan for additional bench space for the optional-but-essential Studio Wash+Cure station ($199) and VOC extractor ($179), plus a clear area for handling wet prints. — Michael Lydick, PC Magazine, 14 Oct. 2026

But this plan is half protein and half carbohydrates with vegetables often optional. — Madeline Holcombe, CNN Money, 14 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