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

Tickets for the 2025 ball, which cost $400 each with optional $140 VIP add-ons, went on sale this April for an event hosted in the San Francisco City Hall building next September. —Mary Whitfill Roeloffs, Forbes, 25 Sep. 2024

An optional paracord lanyard is available for added grip. —New Atlas, 25 Sep. 2024

Setting up the Kubuntu Focus for the first time, you're met by a wizard that can walk you through each (optional) step. —Kevin Purdy, Ars Technica, 24 Sep. 2024

Here, a mustard-color curtain provides an optional barrier between the living space and the dining room. —Abby Wolner, Better Homes & Gardens, 24 Sep. 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