What is the Meaning & Definition of neologism

The richness of the language allows us to talk of new and different ways, creating what is known as 'neologisms' or 'new word'. The neologism is built within a language from elements that can vary in their origin but you always have to do with the adaptation of words or traditional terms to the period in which they arise. A neologism is a new way of expressing a concept that was already previously expressed through words. The Act of accepting (officially or not) those neologisms that are made in each historical moment, is what great richness, variety and complexity to a language. In general, the emergence of a neologism is given from colloquial expressions that remain outside of the language and are spontaneous language and oral communication inventions. To carry out the process of creation of a neologism, various actions may be involuntary mode and not planned. Among them we can mention the union of terms that previously existed separately, combination, derivation and the initialism (i.e., the construction of terms from initials of several different words).
Currently, the creation of neologisms is much more common and obvious than in other times. To a large extent, this situation may be due to permanent interaction between cultures and languages of different type, to the important place that the media have in everyday life, in the simplification of the language and the slow but progressive replacement of communication through media posted on oral media.
The neologism, however, not whenever it is created is destined to remain in the language, many of them passing through periods of instability, stability, acceptance and subsequent oblivion.
Some terms and everyday that were once neologisms can be 'astronaut', 'extra-large', 'computer', 'googling', 'FTAA', 'X ray', 'after', 'Hypertext', 'emoticon', 'drug' and many other.