Akademik
voluntary
1.
adjective
a)
Done, given, or acting of ones own free will.
b)
Working or done without payment.
Syn
:
discretionary
,
optional
,
willful
,
volitional
Ant
:
compulsory
,
obligatory
,
involuntary
See Also:
volition
,
voluntarism
,
voluntarist
,
volunteer
,
will
2.
noun
a)
A short piece of
music
, often having
improvisation
, played on a
solo
instrument
b)
A
volunteer
Wikipedia foundation
.