Definition of "diplomatically"

Frito smiled diplomatically, but was suddenly stricken by a severe stomachache.

1969, The Harvard Lampoon (Henry N. Beard, Douglas C. Kenney), Bored of the Rings, Signet, page 30

Kim Jong-il, who has died aged 69, was the general secretary of the Workers party of Korea, and head of the military in the Democratic People's Republic of Korea (DPRK). He was one of the most reclusive and widely condemned national leaders of the late 20th and early 21st century, leaving his country diplomatically isolated, economically broken and divided from South Korea.

2011 December 19, Kerry Brown, “Kim Jong-il obituary”, in The Guardian‎