0 Someone's ex is a person who was their wife, husband, or partner in the past: --
Is she still in touch with her ex?
1 used to show that someone is no longer what they were: --
my ex-girlfriend
my ex-husband
ex-policemen
ex-prisoners
2 someone you are no longer married to --
3 used to show that someone is no longer in the situation or condition the person had been in; former : --
The governor of Minnesota is an ex-wrestler.
4 not including a particular amount: --
5 used for stating that the price of goods includes transport to a particular place, and then transport arrangements and costs are the buyer's responsibility: --