Optional vs. Voluntary

Difference Between Optional and Voluntary
Optionaladjective
Left to choice; not compulsory or automatic.
Voluntaryadjective
Done or undertaken of one's own free will
a voluntary decision to leave the job.Optionaladjective
Not compulsory; left to personal choice; elective.
On that beach clothing is entirely optional.Voluntaryadjective
Acting or done willingly and without constraint or expectation of reward
a voluntary hostage.voluntary community work.Optionalnoun
Something that is not compulsory, especially part of an academic course.
Voluntaryadjective
Normally controlled by or subject to individual volition
voluntary muscle contractions.Optionalnoun
(programming) In the Swift programming language, a kind of variable that is assigned a specific data type but may or may not hold an actual value.
Voluntaryadjective
Capable of making choices; having the faculty of will
"This law of happiness ... resides in the exercise of the active capacities of a voluntary agent" (John Dewey).Optionaladjective
possible but not necessary; left to personal choice
Voluntaryadjective
Supported by contributions or charitable donations rather than by government appropriations
voluntary hospitals.Voluntaryadjective
Without legal obligation or consideration
a voluntary conveyance of property.Voluntaryadjective
Done intentionally but without premeditation or deliberation, as when under the influence of an intense emotional reaction
voluntary manslaughter.Voluntarynoun
A short piece of music, often improvised on a solo instrument, played as an introduction to a larger work.
Voluntarynoun
A piece for solo organ, often improvised, played before, during, or after a religious service.
Voluntarynoun
A volunteer.
Voluntaryadjective
Done, given, or acting of one's own free will.
Voluntaryadjective
Done by design or intention; intentional.
If a man accidentally kills another by lopping a tree, it is not voluntary manslaughter.Voluntaryadjective
Working or done without payment.
Voluntaryadjective
Endowed with the power of willing.
Voluntaryadjective
Of or relating to voluntarism.
a voluntary church, in distinction from an established or state churchVoluntaryadverb
(obsolete) Voluntarily.
Voluntarynoun
(music) A short piece of music, often having improvisation, played on a solo instrument.
Voluntarynoun
A volunteer.
Voluntarynoun
A supporter of voluntarism; a voluntarist.
Voluntarynoun
(military) a person who freely enlists for service
Voluntarynoun
composition (often improvised) for a solo instrument (especially solo organ) and not a regular part of a service or performance
Voluntaryadjective
of your own free will or design; not forced or compelled;
man is a voluntary agentparticipation was voluntaryvoluntary manslaughtervoluntary generosity in times of disastervoluntary social workersa voluntary confessionVoluntaryadjective
controlled by individual volition;
voluntary motionsvoluntary muscles