Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Using or able to use two languages, especially with equal or nearly equal fluency.
  • adj. 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.
  • adj. Of, relating to, or expressed in two languages: a bilingual dictionary.
  • n. A person who uses or is able to use two languages, especially with equal fluency.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having the ability to speak two languages
  • adj. Spoken or written in two different languages
  • adj. Characterized by the use or presence of two languages
  • n. A person who is bilingual.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Containing, or consisting of, two languages; expressed in two languages.

from The Century Dictionary and Cyclopedia

  • Containing or expressed in two languages; recorded in two versions of different language.
  • Speaking two languages or a mixture of two.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. using or knowing two languages
  • n. a person who speaks two languages fluently

Etymologies

bi- +‎ lingual (Wiktionary)

Examples

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