acting without compulsion and without payment
proceeding from free choice or consent; done without compulsion and without payment; spontaneous
doing or involving unpaid work
voluntary workers
voluntary organizations
intentional
voluntary manslaughter
of, subject to, or controlled by the will
voluntary behaviour
voluntary muscles
having power of free choice
in law, acting or done of one's own free will without legal obligation or regard to the financial consequences
voluntarily /-t(ə)rəli, -ʹterəli/ adv
voluntariness noun
[Middle English from Latin voluntarius, from voluntas will, from vol-, velle to will, wish]