Defining bilingualism in just a few words is not easy, as each individual has different bilingual characteristics. There may be distinctions between ability and use of a language, or differences in proficiency between the two languages.
Let’s define bilingualism simply as the ability to express oneself with ease in two languages.
People usually become bilingual because they need it in their day-to-day lives. As a result the degree of bilingualism may vary from one individual to another. Bilinguals are not necessarily perfectly fluent in their languages; it is in fact quite common to have a dominant language.
It is to be noted that being able to express yourself in two languages takes time. It is not after studying a language for six months that one can become bilingual.