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

Some dishes offer optional add-ons like fish, chicken or beef. —Evan Moore april 8, Charlotte Observer, 8 Apr. 2026

Hydrating Serum This step is optional but helpful. —Kansas City Star, 8 Apr. 2026

Knead with your hands (gloves optional) until the dough is no longer sticky. —Risa Polansky Shiman, Sun Sentinel, 8 Apr. 2026

Some of these technologies are essential for ensuring the proper functioning of the service or website and cannot be disabled, while others are optional but serve to enhance the user experience in various ways. —Walden Green, Pitchfork, 8 Apr. 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