5W1H [ˈfaɪvˈdʌbl̩ˌjuːˌwʌˈneɪt͡ʃ] noun1 •Any of the six basic question words in English, with 5 of them beginning with “w” (what, when, where, who, why) and 1 of them beginning with “h” (how). forms5W1Hs