dip·lo·mat·ic 
(dĭp′lə-mătĭk)
(dĭp′lə-mătĭk)adj.
1. Of, relating to, or involving diplomacy or diplomats.
2. Using or marked by tact and sensitivity in dealing with others.
3.
a. Of or relating to diplomatics.
b. Being an exact copy of the original: a diplomatic edition.
[French diplomatique, from New Latin diplōmaticus, from Latin diplōma, diplōmat-, letter of introduction; see DIPLOMA.]
dip′lo·mati·cal·ly adv.