flatplan noun 1verb 1forms 3 noun1 •A page plan of a publication that shows how the articles and advertisements are laid out."Each country has a fixed amount of space on the flatplan and a limited amount of room on the page, so the skill of the compiler is to select the most relevant services and stations from the data. — 2021 verb1 •To create a plan of this kind. formsflatplanned · flatplanning · flatplans