1
: a polished or smooth surface (as of glass) that forms images by reflection
She looked at herself in the mirror.
2
a
: something that gives a true representation
the press as a mirror of public opinion—
C. G. Bowers
C. G. Bowers
b
: an exemplary model
She is the mirror of feminine beauty.
mirrored; mirroring; mirrors
Examples of mirror in a Sentence
Noun
breaking a mirror is supposed to bring seven years of bad luck
Verb
The building was mirrored in the lake.
the still waters of the pond mirroring the cloudless sky above
Recent Examples on the Web
Nicola Dall'asen, Allure, 12 Mar. 2025
In this sense, AI becomes a high-resolution mirror: revealing, challenging, and ultimately empowering.
—Cornelia C. Walther, Forbes, 12 Mar. 2025
Ars Technica, 13 Mar. 2025
Often, decisions made by CMS to cover services are mirrored by private insurers, which cover about 65% of Americans, mostly through plans provided their employers.
—Alice Park, TIME, 13 Mar. 2025
See All Example Sentences for mirror
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Noun
So facing a mirror in one of Dr. Doft’s patient rooms in a wide-open surgical gown and talking about my own body felt very wrong at first.
—Nicola Dall'asen, Allure, 12 Mar. 2025
In this sense, AI becomes a high-resolution mirror: revealing, challenging, and ultimately empowering.
—Cornelia C. Walther, Forbes, 12 Mar. 2025
Verb
The behavior mirrors a pattern of AI refusals documented across various generative AI platforms.
—Ars Technica, 13 Mar. 2025
Often, decisions made by CMS to cover services are mirrored by private insurers, which cover about 65% of Americans, mostly through plans provided their employers.
—Alice Park, TIME, 13 Mar. 2025
See All Example Sentences for mirror
Cite this Entry
“Mirror.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mirror. Accessed 24 Mar. 2025.
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Medical Definition
mirror
noun
mir·ror
ˈmir-ər 
: a polished or smooth surface (as of glass) that forms images by reflection
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