optional

American  

[op-shuh-nl] / ˈɒp ʃə 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.

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optional British  

/ ˈɒpʃənəl /

adjective

1. possible but not compulsory; left to personal choice

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Other Word Forms

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

Etymology

Origin of optional

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

Example Sentences

AI-driven systems could reveal these patterns by analyzing output, quality and sales impact, and even integrate optional wellness data employees choose to share themselves from their devices.

From The Wall Street Journal

Tomatoes are optional, but when included, they give the richness a little lift, a shimmer of acidity against the warm, cheesy backdrop.

From Salon

This is where crypto will likely live first — not in the main lineup where fiduciary exposure is high, but in the optional “choose your own adventure” lane.

From MarketWatch

But companies that only use Cigna’s PBM will be able to adopt it later on an optional basis, and many employers—who value rebates for helping offset premiums—might be slow to switch.

From The Wall Street Journal

In recent days, Musk has reiterated his Sci-Fi Socialism ideals that AI and robots will relegate work to being optional.

From The Wall Street Journal