interrogation mark From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA question mark. Related wordsSynonymsinterrogation pointinterrogationinterrogation-pointinterrogative-pointinterrogativequeryquestion markpunctus interrogativuspunctus percontativusmarkingx markexclamationinverted question markinterrobangiteration marko mark References Wiktionary — interrogation mark Wikipedia — interrogation mark