manway in English dictionary manway Meanings and definitions of "manway" A hole or duct by which a human being may access a utility area for maintenance purposes. noun A hole or duct by which a human being may access a utility area for maintenance purposes. more Grammar and declension of manway manway ( plural manways) manway (plural manways) more Manway Sample sentences with "manway" Declension Stem Try again Available translations French Irish Paite Chin Tamil Authors