B2 noun ˌvɒlənˈtɪər ˌɔːɡənaɪˈzeɪʃən
volunteer organization
ボランティア団体
Meaning
A nonprofit group of people who offer their services willingly without payment for a cause.
Example
BD Clean is a volunteer organization promoting recycling.
BD Cleanはリサイクルを推進するボランティア団体です。