1
- done, given, or acting of one's own free will自愿的; 志愿的：
we are funded by voluntary contributions.
我们的资金来源于自愿捐赠。
1.1
- working, done, or maintained without payment无偿的; 义务的：
a voluntary helper.
义务的帮助者。
1.2
- Physiology under the conscious control of the brain【生理】随意的。
1.3
- Law (of a conveyance or disposition) made without return in money or other consideration【律】（让与）自愿的; 无偿的。
(pl. -ies)
1
- an organ solo played before, during, or after a church service（教堂礼拜仪式期间或前后的）管风琴独奏曲。
1.1
- historical a piece of music performed extempore, especially as a prelude to other music, or composed in a free style〈史〉（尤指作为其他作品的序曲, 或自由创作的）即兴曲; 自由调。
2
- (in a competition) a special performance left to the performer's choice（比赛中的）自选表演。
派生词
voluntarily
adverbvoluntariness
noun词源
late Middle English: from Old French volontaire or Latin voluntarius, from voluntas 'will'.