vol·un·tary 
/ˈvɑ:lənˌteri, Brit ˈvɒləntri/ adjective
/ˈvɑ:lənˌteri, Brit ˈvɒləntri/ adjective 1 : done or given because you want to and not because you are forced to : done or given by choice
▪ a voluntary agreement/decision ▪ voluntary retirement ▪ voluntary donations ▪ Participation in the program is completely voluntary. ▪ He was charged with voluntary manslaughter. — opposite involuntary 2 a : provided or supported by people who do work without being paid
▪ a voluntary [=volunteer] association/organization
b : doing work without being paid
▪ She works for the charity on a voluntary basis. [=she works as a volunteer for the charity] ▪ (chiefly Brit) Several voluntary workers [=volunteers] help out at the nursing home. 3 : able to be controlled consciously
▪ voluntary bodily movements ▪ the voluntary muscles that control urination — opposite involuntary
▪ a voluntary agreement/decision ▪ voluntary retirement ▪ voluntary donations ▪ Participation in the program is completely voluntary. ▪ He was charged with voluntary manslaughter. — opposite involuntary
▪ a voluntary [=volunteer] association/organization
b : doing work without being paid
▪ She works for the charity on a voluntary basis. [=she works as a volunteer for the charity] ▪ (chiefly Brit) Several voluntary workers [=volunteers] help out at the nursing home.
▪ voluntary bodily movements ▪ the voluntary muscles that control urination — opposite involuntary
— vol·un·tari·ly /ˌvɑ:lənˈterəli, Brit ˈvɒləntrəli/ adverb
▪ They voluntarily submitted to the testing. ▪ Her confession was made voluntarily.
/ˌvɑ:lənˈterəli, Brit ˈvɒləntrəli/ adverb ▪ They voluntarily submitted to the testing. ▪ Her confession was made voluntarily.
