From Longman Dictionary of Contemporary Englishoff-messageˌoff-ˈmessage adjective, adverb a politician who is off-message says things that are different from the ideas of the political party they belong to OPP on-messageFrom Longman Business Dictionaryoff-messageˌoff-ˈmessage adjective, adverb a politician who is off-message says things that are different from the ideas and policies of the political party they belong to → compare on-message