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

Materials List: Bucket Steel wool Sandpaper Dish soap Vinegar Bleach or rubbing alcohol Clean rags Mineral oil Linseed oil (optional) Step 1: Remove dirt. —Lauren Landers, Better Homes & Gardens, 7 Dec. 2024

Part of that comfort came from a tasteful interior, upholstered in all-vinyl, cloth and vinyl, or optional leather. —Robert Ross, Robb Report, 6 Dec. 2024

Could offering a free ice bath plunge be the newest optional work perk to entice employees to spend more time at their workplaces? —Nicholas Wyman, Forbes, 6 Dec. 2024

Exploration encourages subsequent visits, adding tons of side quests, optional dungeons, and bosses outside of the main objectives. —Diego Argüello, Rolling Stone, 6 Dec. 2024

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