circumference

noun

cir·​cum·​fer·​ence sər-ˈkəm(p)-f(ə-)rən(t)s How to pronounce circumference (audio)
sə-,
-fərn(t)s
1
: the perimeter of a circle
The circle measures 22 inches in circumference.
2
: the external boundary or surface of a figure or object : periphery
from the center to the circumference of the sphere
circumferential adjective

Did you know?

Attempts have been made to measure the circumference of the earth since the time of Aristotle. The calculation that Columbus was relying on led him to think he could reach China by sailing west more quickly than by sailing east. But that measurement had calculated the earth's circumference as about a quarter too small, and the rest is history. Columbus wasn't the only one who got it wrong; many later attempts continued to produce different measurements for the earth's circumference—even though the Greeks had calculated it correctly way back in the 3rd century B.C.

Examples of circumference in a Sentence

What is the circumference of the Earth at the equator? The circle is 38 inches in circumference. The fence marks the circumference of the field.
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.
In the largest pythons, this translated to a circumference equal to a pair of 32-inch-waist jeans. Andrew Paul, Popular Science, 24 Oct. 2024 Both forms of decaf coffee improved blood pressure, waist circumference, blood sugar, and triglycerides over four weeks. Lauren O'Connor, Ms, Health, 8 Oct. 2024 Think calf circumference, how to measure your calf, and the special design elements that’ll make getting in and out of your boots a breeze. Katie Decker-Jacoby, StyleCaster, 26 Sep. 2024 Researchers found that the group who added cumin to their yogurt reduced weight, body mass index (BMI), and waist circumference. Barbie Cervoni, Verywell Health, 20 Sep. 2024 See all Example Sentences for circumference 

Word History

Etymology

Middle English, from Middle French & Latin; Middle French, from Latin circumferentia, from circumferre to carry around, from circum- + ferre to carry — more at bear

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of circumference was in the 14th century

Dictionary Entries Near circumference

Cite this Entry

“Circumference.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/circumference. Accessed 22 Nov. 2024.

Kids Definition

circumference

noun
cir·​cum·​fer·​ence sə(r)-ˈkəm(p)-fərn(t)s How to pronounce circumference (audio)
-f(ə-)rən(t)s
1
: a line that goes around or encloses a circle
2
: the outer boundary of a figure or area
3
: the distance around something
the circumference of the earth at the equator
Last Updated: - Updated example sentences
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