ex

/ɛks/
1.
nounmasculine | feminine

former partner

ex (ex-boyfriend, ex-girlfriend, ex-spouse)

J'ai croisé mon ex hier soir en ville.

I ran into my ex yesterday evening in town.

Synonyms:ancien partenaire, ex-compagnon, ex-compagne, ex-conjoint, ancien petit-ami, ancienne petite-amie
2.
prefix

former (used as the prefix ex-)

Son ex-femme habite toujours dans la maison familiale.

His ex-wife still lives in the family house.

Synonyms:ancien, précédent