n. pl. ref·er·en·dums or ref·er·en·da (-də)
a. The submission of a proposed public measure or actual statute to a direct popular vote.
b. Such a vote.
2. A note from a diplomat to the diplomat's government requesting instructions.
[Latin, neuter gerundive of referre, to refer; see REFER.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.