1. The atmospheric glow that remains for a short time after sunset.
2. The light emitted after removal of a source of energy, especially:
a. The glow of an incandescent metal as it cools.
b. The emission of light from a phosphor after removal of excitation.
3. The comfortable feeling following a pleasant experience.
4. A lingering impression of past glory or success.
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.