hel·lo (hĕ-lō, hə-)
Used to greet someone, answer the telephone, or express surprise.
n. pl. hel·los
A calling or greeting of "hello."
intr.v. hel·loed, hel·lo·ing, hel·loes
To call "hello."
[Alteration of hallo, alteration of obsolete holla, stop!, perhaps from Old French hola : ho, ho! + la, there (from Latin illāc, that way).]
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.