There are 2 definitions of ex in English:

ex1

Syllabification: ex

preposition

1(Of goods) sold direct from: carpet tiles offered at a special price, ex stock
2Without; excluding: the discount and market price are ex dividend

Origin

mid 19th century (sense 2): from Latin, 'out of'.

Definition of ex in:

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Word of the day internecine
Pronunciation: ˌɪntəˈniːsʌɪn
adjective
destructive to both sides in a conflict

There are 2 definitions of ex in English:

ex2

Syllabification: ex

noun

informal
A former husband, wife, or partner in a relationship: I don’t want my ex to spoil what I have now
More example sentences
  • Before all the women who came before our wives or our exes, we were brothers.
  • I'd like to think that relations with exes could be dealt with efficiently, professionally and intelligently.
  • We have good relationships with my exes (except for my youngest's father) and their parents.

Origin

early 19th century: independent usage of ex-1.

Definition of ex in: