The Collaborative International Dictionary
Voluntaries
Voluntary \Vol"un*ta*ry\, n.; pl. Voluntaries.
One who engages in any affair of his own free will; a volunteer. [R.]
--Shak.(Mus.) A piece played by a musician, often extemporarily, according to his fancy; specifically, an organ solo played before, during, or after divine service.
(Eccl.) One who advocates voluntaryism.
Wiktionary
voluntaries
n. (plural of voluntary English)
Usage examples of "voluntaries".
The organist started playing voluntaries to reassure the fidgety guests.