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bi·lin·gual (bī-lĭnggwəl)
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adj.
1.
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.
n.
A person who uses or is able to use two languages, especially with equal fluency.
bi·lingual·ism n.
bi·lingual·ly adv.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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