optional
[ op-shuh-nl ]
/ ˈɒp ʃə nl /
adjective
left to one's choice; not required or mandatory: Formal dress is optional.
leaving something to choice.
SYNONYMS FOR optional
OTHER WORDS FROM optional
Words nearby optional
optimum,
optimum dose,
optimum population,
option,
option money,
optional,
optionee,
opto-,
optoelectronics,
optokinetic,
optometer
Example sentences from the Web for optionality
The future for Model S drivers is all about “optionality” said Musk.
Tesla Motors CEO Elon Musk Unveils New Battery Swap System for Model S |William O’Connor |June 22, 2013 |DAILY BEAST
British Dictionary definitions for optionality
optional
/ (ˈɒpʃənəl) /
adjective
possible but not compulsory; left to personal choice