He made a voluntary contribution to the school.
She did a lot of voluntary work for the Red Cross.
Seneca once stated that drunkenness is nothing but voluntary madness.
The muscles make voluntary or involuntary movement of the body possible.
The union took a voluntary pay cut to keep the company from going bankrupt.
voluntary redundancies have helped to decrease the workforce by almost 10%.
The British Commonwealth is a voluntary association of fifty-four independent countries.
This charity is an entirely non-profit, voluntary organization and is not affiliated with any government agency or business enterprise.
Government medical insurance here in British Columbia is available to all residents on a voluntary subscription basis for a low monthly fee.
The government is hoping television stations will comply with voluntary guidelines regarding appropriate programming during peak viewing hours.
Agatha Christie once suggested that we owe most of our great inventions, and most of the achievements of genius to idleness – either enforced or voluntary.