a) is an individual that willingly accepts a task, project, or some kind of responsibility without being ordered, requested, told, or assigned to do so. Oftentimes, a volunteer performs his work without compensation but instead using motivation that he or she is doing the right thing. For instance, a volunteer may wish to assist at an organization’s charitable event for free and without being told to do so.
b) is an act of actively taking on a task or project by an individual as a response to an official request. For instance, an employee can volunteer to study an issue or problem or to test out a new product or service.
In a Sentence:
Sarah has acted as a volunteer at all Omega-Pharma’s charity events, feeling joy from helping others and giving back to the local community.
The marketing department has asked for a volunteer to test out their latest advertisement series.
If you want to get promoted, sometimes you have to volunteer for projects that no one else wants to do.
Synonyms and related words: voluntary organization, voluntary, voluntary trade, voluntary trade, voluntary redundancy