fraction

noun

frac·​tion ˈfrak-shən 

1

a

: a numerical representation (such as ¾, ⅝, or 3.234) indicating the quotient of two numbers

b(1)

: a piece broken off : fragment

(2)

: a discrete unit : portion

2

: one of several portions (as of a distillate) separable by fractionation

3

: bit, little

a fraction closer

Synonyms of fraction

• fragment
• piece
• bit
• scrap

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 on the Web

The score was still 3-1 after 20 minutes, but Vegas defenseman Brayden McNabb beat Bussi with a shot from the circles that crossed the goal line a fraction of a second after the clock hit zero. —Michael Russo, New York Times, 10 June 2026

For others, the same outcome is available closer to home, at a fraction of the cost. —Hanna Wickes, Charlotte Observer, 10 June 2026

While that vision hasn’t yet come to pass—agentic payment volumes are still a fraction of broader commercial flows—companies are still believers that humans will use AI to pay for products and that bots will pay other bots. —Ben Weiss, Fortune, 10 June 2026

Replacing a central air conditioning system can cost several thousand dollars, while many common repairs — such as replacing capacitors, contactors, thermostats or electrical components — may cost only a fraction of that amount. —Angelica Leicht, CBS News, 9 June 2026

Word History

Etymology

Middle English fraccioun "act or result of breaking, mathematical fraction," borrowed from Medieval Latin frāctiōn-, frāctiō "breaking, division into parts, mathematical fraction," going back to Late Latin, "breaking, weariness, illness," from Latin frag-, variant stem of frangere "to break, shatter" + -tiōn-, -tiō, suffix of verbal action — more at break entry 1

First Known Use

14th century, in the meaning defined at sense 1a

Phrases Containing fraction

• common fraction
• complex fraction
• continued fraction
• decimal fraction
• improper fraction
• partial fraction
• proper fraction
• simple fraction

Rhymes for fraction

• action
• faction
• traction
• abstraction
• attraction
• compaction
• contraction
• detraction
• diffraction
• distraction
• exaction
• extraction

Kids Definition

fraction

noun

frac·​tion ˈfrak-shən 

1

: a number (as ½, ¾, or 3.323) that represents a number of equal parts of a whole or the division of one number by another

2

: a part of a whole

Medical Definition

fraction

noun

frac·​tion ˈfrak-shən 

: one of several portions (as of a distillate) separable by fractionation

gamma globulin is a fraction of blood plasma