a.

1. 洁净的，无污垢的
   He had on immaculate white shoes.

   他穿着一双洁白的鞋子。

2. 无瑕疵的，完美的
   immaculate behavior

   纯洁无瑕的行为

3. 无过失的，清白无辜的
   She was immaculate of history.

   她的一生白壁无瑕。

4. 【生】无（斑）点的

adj.

1. perfectly clean, neat, or tidy.
2. free from flaws or mistakes.
   ▸Catholic Theology  free from sin.
3. Botany  & Zoology  uniformly coloured without spots or other marks.