a. Using or able to use two languages, especially with equal or nearly equal fluency.
b. Using two languages in some proportion in order to facilitate learning by students who have a native proficiency in one language and are acquiring proficiency in the other: bilingual training; bilingual education.
2. Of, relating to, or expressed in two languages: a bilingual dictionary.
A person who uses or is able to use two languages, especially with equal fluency.
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