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

A department of Nouvelle-Aquitaine, France. Capital: Niort.

(psychiatry) A rare syndrome in which a symptom of psychosis (particularly a paranoid or delusional belief) is transmitted from one person to another.

Alternative form of pas de deux

(dance) A dance performed by two dancers. / (figuratively) A complicated relationship or process involving two entities, usually persons.

(urology) Urinary urgency shortly after voiding.

plural of folie à deux