Definitions for "Bilingualism"
the state of knowing two or more languages, but not necessarily using them with equal proficiency or in equal proportions. People who acquire two (or more) languages in infancy or early childhood may be considered to be native bilinguals; that is, they have two NATIVE LANGUAGES.
the ability to use two languages
The habitual use, e.g. by a person or a community, of two lanĀ­guages.
Keywords:  quality
Quality of being bilingual.