1. A surface capable of reflecting sufficient undiffused light to form an image of an object placed in front of it. Also called looking glass.
2. Something that faithfully reflects or gives a true picture of something else.
3. Something worthy of imitation.
tr.v. mir·rored, mir·ror·ing, mir·rors
To reflect in or as if in a mirror: "The city mirrors many of the greatest moments of Western culture" (Olivier Bernier).
[Middle English mirour, from Old French mireor, from mirer, to look at, from Latin mīrārī, to wonder at, from mīrus, wonderful; see smei- in the Appendix of Indo-European roots.]
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.