[fo-lee uh doo; Fr. faw-lee a dœ] 
[fo-leez uh doo; Fr. faw-lee za dœ] . Psychiatry. | the sharing of delusional ideas by two people who are closely associated. |
| fo·lie à deux (fô-lē' ä dɶ', fŏl'ē) n. A condition in which symptoms of a mental disorder, such as the same delusional beliefs or ideas, occur simultaneously in two individuals who share a close relationship or association. [French : folie, madness + à, between + deux, two.] |