symmetry

noun

sym·​me·​try ˈsi-mə-trē How to pronounce symmetry (audio)
plural symmetries
1
: balanced proportions
also : beauty of form arising from balanced proportions
2
: the property of being symmetrical
especially : correspondence in size, shape, and relative position of parts on opposite sides of a dividing line or median plane or about a center or axis compare bilateral symmetry, radial symmetry
3
: a rigid motion of a geometric figure that determines a one-to-one mapping onto itself
4
: the property of remaining invariant under certain changes (as of orientation in space, of the sign of the electric charge, of parity, or of the direction of time flow)
used of physical phenomena and of equations describing them

Examples of symmetry in a Sentence

the symmetry of the human body The building has perfect symmetry.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Within this diversity was an underlying symmetry. D. T. Max, New Yorker, 15 Sep. 2025 There’s symmetry from last year to this year, too. Alex Zietlow, Charlotte Observer, 11 Sep. 2025 Or if the melody falls five notes with five syllables of text, the notes of the tintinnabuli triad will alternate above and below that line to create a different musical texture – all organized around symmetry. Jeffers Engelhardt, The Conversation, 10 Sep. 2025 The lobby speaks in marble and symmetry rather than spectacle, a reminder that this building has seen London change around it without feeling the need to change its voice. Lauren Mowery, Forbes.com, 10 Sep. 2025 See All Example Sentences for symmetry

Word History

Etymology

Latin symmetria, from Greek, from symmetros symmetrical, from syn- + metron measure — more at measure

First Known Use

1563, in the meaning defined at sense 1

Time Traveler
The first known use of symmetry was in 1563

Browse Nearby Words

Cite this Entry

“Symmetry.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/symmetry. Accessed 18 Sep. 2025.

Kids Definition

symmetry

noun
sym·​me·​try ˈsim-ə-trē How to pronounce symmetry (audio)
plural symmetries
1
: balanced proportions
2
: close agreement in size, shape, and relative position of parts on opposite sides of a dividing line or plane or around a central point compare bilateral symmetry, radial symmetry

Medical Definition

symmetry

noun
sym·​me·​try ˈsim-ə-trē How to pronounce symmetry (audio)
plural symmetries
1
: correspondence in size, shape, and relative position of parts on opposite sides of a dividing line or median plane or about a center or axis see bilateral symmetry, radial symmetry
2
: the property of remaining invariant under certain changes (as of orientation in space, of the sign of the electric charge, of parity, or of the direction of time flow)
used of physical phenomena and of equations describing them

More from Merriam-Webster on symmetry

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