GNU Collaborative International Dictionary of English

Found 3 definitions

1.       
   ex (ĕks), n. [contraction]  An ex-wife or ex-husband; a former spouse; -- used usually with a possessive; as, “she invited her ex to her second wedding; her ex; his ex; John's ex”. [informal]
   
   [PJC]
   
   
         
       

2.       
   ex (ĕks), n.  The letter x.
   
   [PJC]
   
   
         
       

3.       
   ex (ĕks), prep.  (Finance) Without (some right); not including the right to have; as, “a stock selling ex dividend (a stock for which the right to a dividend has expired the previous day); ex interest; ex rights”.
   
   [PJC]