definitions
• synonyms

# circumference

[ser-kuhm-fer-uh ns]
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noun
1. the outer boundary, especially of a circular area; perimeter: the circumference of a circle.
2. the length of such a boundary: a one-mile circumference.
3. the area within a bounding line: the vast circumference of his mind.

## Origin of .css-1fxfie5{font-size:22px;}@media (max-width:768px){.css-1fxfie5{font-size:18px;margin:0 10px 10px 0;word-break:break-all;word-wrap:break-word;-webkit-hyphens:auto;-moz-hyphens:auto;-ms-hyphens:auto;hyphens:auto;line-height:22px;}}circumference

1350–1400; Middle English < Late Latin circumferentia, equivalent to circum- circum- + fer- (stem of ferre to carry) + -entia -ence
Can be confusedcircumference diameter radius tangent

## Synonyms

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1. periphery, circuit.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for circumference

### Historical Examples

• #### Draw a diagram representing the circumference line and pitch in feet.

Flying Machines

W.J. Jackman and Thos. H. Russell

• #### Melville is an island of more than a mile in circumference, with low, rocky shores.

Ned Myers

James Fenimore Cooper

• #### The diameter is then multiplied by 3.1416 to obtain the circumference.

Boys' Book of Model Boats

Raymond Francis Yates

British Dictionary definitions for circumference

# circumference

noun
1. the boundary of a specific area or geometric figure, esp of a circle
2. the length of a closed geometric curve, esp of a circle. The circumference of a circle is equal to the diameter multiplied by π

## Word Origin

C14: from Old French circonference, from Latin circumferre to carry around, from circum- + ferre to bear
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Word Origin and History forcircumference

### n.

late 14c., from Latin circumferentia, neuter plural of circumferens, present participle of circumferre "to lead around, take around, carry around," from circum "around" (see circum-) + ferre "to carry" (see infer). A loan-translation of Greek periphereia "periphery, the line round a circular body," literally "a carrying round" (see periphery). Related: Circumferential.

Online Etymology Dictionary, © 2010 Douglas Harper

circumference in Science

# circumference

[sər-kŭmfər-əns]
1. The boundary line of a circle.
2. The boundary line of a figure, area, or object.
3. The length of such a boundary. The circumference of a circle is computed by multiplying the diameter by pi.