Tapu (Polynesian culture)

Tapu or tabu is a Polynesian traditional concept denoting something holy or sacred, with "spiritual restriction" or "implied prohibition"; it involves rules and prohibitions. The English word "taboo" derives from this later meaning and dates from Captain James Cook's visit to Tonga in 1777. 
The concept exists in many societies, including traditional Fijian, Māori, Samoan, Kiribati, Rapanui, Tahitian, Hawaiian, and Tongan cultures, in most cases using a recognisably similar word (from Proto-Polynesian "*tapu"), though the Rotuman term for this concept is "ha'a". In Hawaii, a similar concept is known as "kapu".
In Māori tradition.
In Māori and Tongan tradition, something that is tapu is considered inviolable or sacrosanct. Things or places which are tapu must be left alone, and may not be approached or interfered with. In some cases, they should not even be spoken of. 
In Māori society the concept was often used by "tohunga" (priests) to protect resources from over-exploitation, by declaring a fishery or other resource as tapu (see rāhui).
There are two kinds of tapu, the private (relating to individuals) and the public tapu (relating to communities). A person, object, or place that is tapu, may not be touched by human contact, in some cases, not even approached. A person, object, or place could be made sacred by tapu for a certain time.
In pre-contact society, tapu was one of the strongest forces in Māori life. A violation of tapu could have dire consequences, including the death of the offender through sickness or at the hands of someone affected by the offence. In earlier times food cooked for a person of high rank was tapu, and could not be eaten by an inferior. A chief's house was tapu, and even the chief could not eat food in the interior of his house. Not only were the houses of people of high rank perceived to be tapu, but also their possessions including their clothing. Burial grounds and places of death were always tapu, and these areas were often surrounded by a protective fence. 
In at least one case, a chief declared a whole settlement - Auckland, a newly founded European settler town - as tapu, to clarify to other tribes that he considered it as under his protection.
Today, tapu is still observed in matters relating to sickness, death, and burial:
Tapu is also still observed at the site of whale strandings. Whales are regarded as spiritual treasures as being descendants of the ocean god, Tangaroa, and are as such held in very high respect. Sites of whale strandings and any whale carcasses from strandings are treated as sacred ground.
Noa.
"Noa", on the other hand, lifts the "tapu" from the person or the object. "Noa" is similar to a blessing. Tapu and noa remain part of Māori culture today, although persons today are not subject to the same tapu as that of previous times. A new house today, for example, may have a "noa" ceremony to remove the "tapu", in order to make the home safe before the family moves in.