/ eks; NAmE / noun , preposition
■ noun
( pl. exes ) ( informal ) a person's former wife, husband or partner :
The children are spending the weekend with my ex and his new wife.
■ preposition
( BrE ) not including sth :
The price is £1 500 ex VAT.
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WORD ORIGIN
preposition mid 19th cent.: from Latin , out of .
noun early 19th cent.: independent usage of ex- .