Open English Wordnet
Nouns
(n)voluntarycomposition (often improvised) for a solo instrument (especially solo organ) and not a regular part of a religious service or musical performance Adjectives
(a)voluntaryof your own free will or design; done by choice; not forced or compelled“man is a voluntary agent”,
“participation was voluntary”,
“voluntary manslaughter”,
“voluntary generosity in times of disaster”,
“voluntary social workers”,
“a voluntary confession” (a)voluntarycontrolled by individual volition“voluntary motions”,
“voluntary muscles” 