Synonyms of optional

optional

adjective

ˈäp-sh(ə-)nəl 

as in voluntary

subject to one's freedom of choice

at the resort all recreational activities are optional, and you may choose to participate in none of them

Synonyms & Similar Words

• voluntary
• elective
• discretionary
• alternative
• unnecessary
• chosen
• alternate
• unwanted
• dispensable
• unneeded

Antonyms & Near Antonyms

• mandatory
• compulsory
• required
• obligatory
• necessary
• essential
• requisite
• nonvoluntary
• nonelective
• indispensable

Example Sentences

Recent Examples of optional

Strain into a rocks glass or up into a cocktail class that’s rimmed with tajin (also optional). — Jeremy Repanich, Robb Report, 18 July 2026

The test vehicle wore optional Supernova Bronze metallic paint. — ArsTechnica, 17 July 2026

An optional Google Calendar integration should enable the Busy Bar to automatically display a reminder before events and a busy status during these appointments. — Jill Duffy, PC Magazine, 17 July 2026

The next morning began with an optional sunrise excursion overlooking Lake Titicaca. — Susmita Baral, Travel + Leisure, 17 July 2026