tiers

/tjɛʁ/
1.
nounmasculine

a third (one of three equal parts)

Il a mangé un tiers de la pizza tout seul.

He ate a third of the pizza by himself.

2.
nounmasculine

a third party; an external person or organization not directly involved

On ne doit pas laisser un tiers s'en mêler.

We shouldn't let a third party get involved.

Synonyms:personne extérieure, partie tierce