n.

1. 缺点；弱点[C]
   We all have our little failings.

   我们都有自己的小缺点。

a.

1. 衰退（或减弱）中的
   He had given up his job because of failing health.

   由于体质衰弱他放弃了工作。

prep.

1. 如果没有……；若无……时
   You may find her at home, or failing that, try the library.

   你可能在家里找到她，若不在的话，不妨去图书馆找找看。

n.

prep.