tête-à-tête /tedəˈtet / noun, adj. 

Definition:  A private conversation between two people.

Etymology: Tête-à-tête is a French word that translates to “head-to-head.” It was used in the late 17th century.

In a Sentence

The two girls stepped aside from the group to have a tete-a-tete. 

The girls’ parents had a tête-à-tête after they were in bed to discuss their Christmas presents.

The coach pulled one of his students aside to have a tête-à-tête about how they’re performing.

Synonyms 

Conversation, heart-to-heart

Antonyms 

Public