à deux

English

Etymology

French

Adjective

Wikipedia has an article on:

À deux

Wikipedia

à deux

1. Of, for, or involving only two people; one-on-one.

   "It is arguable that Litvinov, had he met with civility and those supple conversations à deux in which trained diplomats excel, might have stopped the war..." --William Manchester, The Last Lion Vol. 2, page 458

Adverb

à deux

1. privately