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

Declining or withdrawing these optional agreements does not prevent users from using core smart TV functionality. — John Higgins, The Verge, 11 Nov. 2026

The company also offers a 24/7 pet helpline and optional wellness benefits. — Matt Richardson, CBS News, 10 Nov. 2026

Fresh sage, parsley, and thyme bring balance, while optional fennel seeds add a little extra aromatic punch. — Shilpa Uskokovic, Bon Appetit Magazine, 10 Nov. 2026

The optional write-back mode could still hold new data on the SSD, though. — ArsTechnica, 10 Nov. 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