volunteer

1 volunteer /ˌvɑːlənˈtiɚ/ noun
plural volunteers
1 volunteer
/ˌvɑːlənˈtiɚ/
noun
plural volunteers
Britannica Dictionary definition of VOLUNTEER
[count]
: someone who does something without being forced to do it: such as
a  : a person who chooses to join the military
b  : a person who does work without getting paid to do it
2 volunteer /ˌvɑːlənˈtiɚ/ verb
volunteers; volunteered; volunteering
2 volunteer
/ˌvɑːlənˈtiɚ/
verb
volunteers; volunteered; volunteering
Britannica Dictionary definition of VOLUNTEER
1 
[no object]
a  : to offer to do something without being forced to or without getting paid to do it
b  : to choose to join the military
2 
[+ object] : to give (something) without being forced to or without getting paid for it
3 
[+ object] : to say that someone will do something without asking if he or she wants to do it
3 volunteer /ˌvɑːlənˈtiɚ/ adjective
3 volunteer
/ˌvɑːlənˈtiɚ/
adjective
Britannica Dictionary definition of VOLUNTEER
always used before a noun
: of, relating to, or done by volunteers