a. A bright blue, as of a clear sky.
b. Heraldry The color blue.
2. The blue sky.
[Middle English, from Old French azur, from Medieval Latin azura, from Arabic al-lāzaward, the azure : al-, the + lāzaward, azure (from Persian lāzhuward, lapis lazuli).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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:
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.