retaliation Syllabification: (re·tal·i·a·tion)Pronunciation: /riˌtalēˈāSHən/Translate retaliation | into French | into German | into Italian | into Spanish Definition of retaliation noun the action of returning a military attack; counterattack:the bombings are believed to be in retaliation for the trial of 15 suspects the action of harming someone because they have harmed oneself; revenge:protectionism invites retaliationretaliation in other Oxford dictionaries Definition of retaliation in the British & World English dictionary