optional

[op-shuh-nl]

adjective

1. left to one's choice; not required or mandatory.

   Formal dress is optional.

   Synonyms: voluntary, elective, discretional

2. leaving something to choice.

optional

/ ˈɒpʃənəl /

adjective

1. possible but not compulsory; left to personal choice

Other Word Forms

• optionality noun
• optionally adverb
• nonoptional adjective
• nonoptionally adverb
• unoptional adjective
• unoptionally adverb

Word History and Origins

Origin of optional¹

First recorded in 1755–65; option + -al ¹

Example Sentences

The app’s safety features, such as an emergency button and optional ride tracking, will still be available while using cash.

From Los Angeles Times

The government has issued guidance saying any additional costs need to be laid out clearly and are optional, but nurseries say charging for extras is the only way to make up the shortfall.

From BBC

Forgive me for disagreeing with my colleague’s assessment yesterday that caring about Markle’s engagement to Prince Harry is optional and in the larger scheme of things, doesn’t matter much.

From Salon

Seth Gershenson, an economist and associate professor of public affairs at American University, suggested that in-person school may seem optional to students in the same way that going to the office feels optional for adults.

From Los Angeles Times

And that is part of the fascination with this American institution - that feeling of style over substance, that all publicity is good publicity and actually winning is optional.

From BBC