optional

adjective

op·​tion·​al ˈäp-sh(ə-)nəl 

: involving an option : not compulsory

optionality

ˌäp-shə-ˈna-lə-tē 

noun

optionally adverb

Synonyms

• discretionary
• elective
• voluntary

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

After a half hour, I was called for my optional seshin, a full-body scrub delivered by an ajumma wearing the standard jjimjilbang uniform of black lace bra and underwear and wielding her exfoliating mitt like a weapon. —Peggy Orenstein, AFAR Media, 6 Jan. 2025

Also available is an optional, more comfortable Kevlar seat and a handy bike stand that is perfect for storing the bike or for occasional maintenance. —New Atlas, 6 Jan. 2025

Lemon wedges, optional Instructions Heat oven to 425°F and line a sheet pan with parchment paper. —Fox News, 5 Jan. 2025

Season and cook chicken: When ready to use, season chicken: Drizzle chicken with 1 tablespoon olive oil, and sprinkle with one to two tablespoons seasoning blend and a pinch of lemon zest (optional) for every pound of chicken. —Mary Claire Britton, Southern Living, 5 Jan. 2025

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