1. Wearing a mask.
2. Disguised or concealed as if by a mask: masked emotions.
3. Latent or hidden, as a symptom or disease.
4. Botany Personate.
a. Having markings in the shape of a mask on the head or face.
b. Having the anatomy of the next developmental form outlined beneath the integument, as in certain insect pupae.
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.