n.

1. （A-）（基督教的）使徒；十二个门徒之一；传道先驱者
   All Christians know that Jesus had 12 apostles, and one of them betrayed him.

   基督徒都知道耶稣有十二个使徒，其中有一个背叛了他。

2. 早期基督教的传教士
3. （改革运动的）倡导者
4. 摩门教教会的十二个行政执事之一

n.

1. (Apostle) each of the twelve chief disciples of Jesus Christ.
   ▸an important early Christian teacher or missionary.
2. a vigorous and pioneering supporter of an idea or cause.