According to Wikipedia:

The terms multiracial, biracial, and mixed-race describe people whose ancestors are not of a single race. (Biracial strictly refers to those with ancestors from exactly two races). One example might be a mulatto, a person with a white and a black parent. Another might be the Mestizo who are descended from caucasian and indigenous ancestors. It is sometimes a matter of opinion if people are mixed-race, because races themselves are not clearly defined. This has caused some problems for census-takers.

Multiracial also describes a society or group that is composed of people from more than one racial or ethnic group. See also multicultural and coloured.

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According to Wikipedia:

Monoculturalism is the practice of actively preserving a culture to the exclusion of external influences. It should not be confused with a homogenous society, which is one with racial uniformity, but some possible exposure to foreign culture. An example of a homogenous society of this sort would be Japan, where American post-war cultural influence has modified the traditional society to some extent. Iceland, North Korea, and Spain under Francisco Franco are examples of monoculturalism. Usually a monocultural society exists due to undeveloped communications structures, geographic isolation, or political isolation (sometimes but not always under a totalitarian regime). Bhutan could also be said to be monocultural.

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According to Wikipedia:

Multiculturalism…is a theory (albeit vague) about the foundations of a culture rather than a practice which subsumes cultural ideas. (Harrison, 1984)

Looked at broadly, the term is often used to describe societies (especially nations) which have many distinct cultural groups, usually as a result of immigration. This can lead to anxiety about the stability of national identity, yet can also lead to cultural exchanges that benefit the cultural groups. Such exchanges range from major accomplishments in literature, art and philosophy to relatively token appreciation of variations in music, dress and new foods.

On a smaller scale, the term can also be used to refer to specific districts in cities where people of different cultures co-exist. The actions of city planners can result in some areas remaining monocultural, often due to pressure groups active in the local political arena. This is especially applicable for the UK.

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