ex-是什么意思？

ex-

英[eks] 美[ɛks]

• pref. 表示“由…出来，自”之义；

柯林斯高阶英汉双解学习词典释义

• PREFIX
  （加在名词前）表示“以前的”，“前任的”
  ex- is added to nouns to show that someone or something is no longer the thing referred to by that noun. For example, a woman's ex-husband is no longer her husband.
  例句
  ...my ex-wife. 我的前妻 ...ex-President Reagan. 前任总统里根

行业词典

• 医学： 〔前缀〕意为离开、无、从或除去，有时用于表示“全部，彻底”，如exterminate(灭绝)；