Marae generally consist of an area of cleared land roughly rectangular (the marae itself), bordered with stones or wooden posts (called au in Tahitian and Cook Islands Māori) perhaps with paepae (terraces) which were traditionally used for ceremonial purposes; and in some cases, such as Easter Island, a central stone ahu or a'u is placed.
In some modern Polynesian societies, notably that of the Māori of New Zealand, the marae is still a vital part of everyday life.
In tropical Polynesia, most marae were destroyed or abandoned with the arrival of Christianity in the 19th century, and some have become attractions for tourists or archaeologists.
The word has been reconstructed by linguists to Eastern Oceanic *malaqe with the meaning "open, cleared space used as meeting-place or ceremonial place".
Like the related institutions of old Polynesia, the marae is a wāhi tapu, a 'sacred place' which carries great cultural meaning.
For example, the word paepae refers to the bench where the speakers sit; this means it retains its sacred and ceremonial associations.
Marae vary in size, with some wharenui being a bit bigger than a double garage, and some being larger than a typical town hall.
An example of such a small settlement with its own marae is at Hongoeka Bay, Plimmerton, the home of the renowned writer Patricia Grace.
Since the second half of the 20th century, Māori in urban areas have been establishing intertribal marae such as Maraeroa in eastern Porirua.
In recent years, it has become common for educational institutions, including primary and secondary schools, technical colleges, and universities, to build marae for the use of the students and for the teaching of Māori culture.
Its primary function is to serve as a venue for the teaching of whaikōrero (oratory), Māori language and culture, and important ceremonies for distinguished guests of the university.
As in pre-European times, marae continue to be the location of many ceremonial events, including birthdays, weddings, and anniversaries.