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Definition of fraction
1a : a numerical representation (such as ^{3}⁄_{4}, ^{5}⁄_{8}, or 3.234) indicating the quotient of two numbersb (1) : a piece broken off : fragment (2) : a discrete unit : portion
2 : one of several portions (as of a distillate) separable by fractionation
Examples of fraction in a Sentence
a fraction of an inch
if even a tiny fraction of that cookie broke off and fell into the delicate watch works, it could mess things up
Recent Examples of fraction from the Web

This one has a similar albeit more subdued vibe at a fraction of the cost.

A Fraction of the Whole by Steve Toltz (Spiegel & Grau)

And while only 30 percent or so of the students pay the full price, even the ones with large financial aid packages work only a fraction of that amount.

Real, luxury handbags come at a fraction of the price.

All Jimbo’s lagoon really needs, critics of the city plan say, is a soft shoreline of sand, rock and native plants that would cover the old seawall, providing a natural look and function at a fraction of the cost of new steel and concrete.

In morning trading, Eversource shares fell a fraction of 1 percent, to $62.27.

NATO’s own budget is just a fraction of the alliance’s overall outlay on defense, most of which comes from national governments.

After a journey lasting 3 billion years, that is to say, a quarter of the age of the universe, those waves started jiggling LIGO’s mirrors back and forth by a fraction of an atomic diameter 20 times a second.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fraction'. Views expressed in the examples do not represent the opinion of MerriamWebster or its editors. Send us feedback.
Origin and Etymology of fraction
Middle English fraccioun, from Late Latin fraction, fractio act of breaking, from Latin frangere to break — more at break
Other Mathematics and Statistics Terms
FRACTION Defined for English Language Learners
fraction
playDefinition of fraction for English Language Learners

mathematics : a number (such as 1/2 or 3/4) which indicates that one number is being divided by another; also : a number (such as 3.323) that consists of a whole number and a decimal

: a part or amount of something
FRACTION Defined for Kids
fraction
playDefinition of fraction for Students
1 : a number (as ^{1}⁄_{2}, ^{2}⁄_{3}, {frac17/100}) that indicates one or more equal parts of a whole or group and that may be considered as indicating also division of the number above the line by the number below the line
2 : a part of a whole : fragment I sold the car for a fraction of what I paid for it.
Word Root of fraction
The Latin word frangere, meaning “to break,” and its form fractus give us the roots frag and fract. Words from the Latin frangere have something to do with breaking. Something fragile is easily broken. A fraction is a portion broken off from a whole. To fracture something, such as a bone, is to break it. A fragment is a part that has been broken off from something larger or that is incomplete.
Medical Dictionary
fraction
playMedical Definition of fraction
: one of several portions (as of a distillate) separable by fractionation gamma globulin is a fraction of blood plasma
Learn More about fraction

See words that rhyme with fraction Thesaurus: All synonyms and antonyms for fraction Spanish Central: Translation of fraction Nglish: Translation of fraction for Spanish speakers Britannica English: Translation of fraction for Arabic speakers Britannica.com: Encyclopedia article about fraction
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