What is the Meaning & Definition of bilingualism

The concept of bilingualism allows our language capacity that holds a person use and speak indistinctly designate two different languages, in any communicative situation and always with great efficiency. Bilingualism can be of two types, native, or acquired failing. With an example, we will see this distinction clearly, the child who was born in Italy but having Argentine parents, will speak the language of his family, which is the Spanish and of course speak Italian which is the language spoken in the country in which they reside. This case is part of the type of native bilingualism.
On the other hand, when the child is born and lives the rest of his life in Mexico will speak Spanish course, which is the language in that country, meanwhile, if since childhood, from the age of four, he begins to study English, at one point and with the passing of the learning will dominate almost the same as their native language language perfectly then, in this case we have an acquired bilingualism.
It should be noted that what is written in two languages can also be expressed with the term that concerns us.

Also, when two languages are used in the same region will discuss the existence of bilingualism in that community. Such a situation tends to be very common in regions that have been dominated by another country for a long time and that obviously played a role in the adoption of the original language of the same as their own.
From the above it is clear that bilingualism involves the domain, understanding that has a guy on two different languages and can therefore use each one in a satisfactory manner when you need it. Bilingualism will be manifested only when the management of both languages is perfect.
If someone for example speak a language with some fluency but not perfection shall not be construed as bilingual.
For a few decades now bilingualism has spread throughout the world and has largely been the process of globalization which has influenced this.