the conduct by government officials of negotiations and other relations between nations.

the art or science of conducting such negotiations.

skill in managing negotiations, handling people, etc., so that there is little or no ill will; tact

Seating one's dinner guests often calls for considerable diplomacy.

noun

bad manners , impoliteness , rudeness

noun

address , artfulness , craft , delicacy , delicatesse , discretion , expedience , finesse , negotiation , poise , politics , savoir-faire , skill , statecraft , subtlety , tactfulness , dexterity , graciosity , statesmanship , tact