Entry 1 sense Webster, 1913 Diplomatically · Dip·lo·mat·ic·al·ly · IPA /ˌdɪ.pləˈmæt.ɪk(.ə)li/ 01 adv. According to the rules of diplomacy; in the manner of a diplomatist; artfully. 1. According to the rules of diplomacy; in the manner of a diplomatist; artfully.