voluntary
英 ['vɒlənt(ə)rɪ]美['vɑləntɛri]
- adj. 自愿的;志愿的;自发的;故意的
- n. 志愿者;自愿行动
英英释意
- 1. (military) a person who freely enlists for service
- 2. composition (often improvised) for a solo instrument (especially solo organ) and not a regular part of a service or performance