1. A complete range or extent: a face that expressed a gamut of emotions, from rage to peaceful contentment.
2. Music The entire series of recognized notes.
[Middle English, the musical scale, from Medieval Latin gamma ut, low G : gamma, lowest note of the medieval scale (from Greek, gamma; see GAMMA) + ut, first note of the lowest hexachord (after ut, first word in a Latin hymn to Saint John the Baptist, the initial syllables of successive lines of which were sung to the notes of an ascending scale CDEFGA: Ut queant laxis resonare fibris Mira gestorum famuli tuorum, Solve polluti labii reatum, Sancte Iohannes).]
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:
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.