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

The day of rest Kirk proposes is optional. —Judith Shulevitz, The Atlantic, 22 Dec. 2025

The Alpina also includes nearly every optional X7 M60i feature as standard equipment. —James Raia, Mercury News, 21 Dec. 2025

The energy storage systems company CMBlu Energy said storage clearly stands out as a winner this year too, moving from optional to essential. —Jennifer McDermott, Fortune, 21 Dec. 2025

Cradling While this is optional, ask to have the meat cut from the bone and then tied back onto the bone – called cradling. —Susan Selasky, Freep.com, 19 Dec. 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