a.

1. 老的，上了年纪的
   Oxford is an old university.

   牛津大学是一所老大学。

2. 旧的；破旧的
3. ……岁（的）
   My father is fifty years old.

   我的父亲五十岁了。

4. 多年的，长时间的，旧交的[B]
5. 以前的，原来的[Z][B]
   He got his old job back.

   他恢复了原来的工作。

6. 熟悉的，老一套的[Z]
   None of that old excuse of yours!

   别再搬出你那老生常谈的借口了！

7. 古代的，古时的；过时的
8. 【口】（用于称呼前，表示亲密）老……

n.

1. 古时，旧时

adj.

1. having lived for a long time; no longer young.
   ▸made or built long ago.
   ▸possessed or used for a long time.
2. former; previous.
3. long-established or known:
   old friends.
4. of a specified age.
   ▸ [as noun] a person or animal of the age specified:

   a five-year-old.
5. informal expressing affection, familiarity, or contempt:
   good old Mum.