"à deux." YourDictionary, n.d. Web. 10 December 2018. <https://www.yourdictionary.com/a-deux>.
à deux. (n.d.). Retrieved December 10th, 2018, from https://www.yourdictionary.com/a-deux
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