UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈfrækʃən/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/ˈfrækʃən/ ,USA pronunciation: respelling(frakshən)

WordReference Random House Learner's Dictionary of American English © 2020
frac•tion /ˈfrækʃən/USA pronunciation   n. [countable]
  1. Mathematicsa number usually expressed in the form a/b.
  2. a part of a whole;
    portion:Only a fraction of the members voted.
  3. a very small part or segment:You can now buy this software at only a fraction of the original cost.
frac•tion•al, adj. See -frac-.

WordReference Random House Unabridged Dictionary of American English © 2020
frac•tion  (frakshən),USA pronunciation n. 
  1. Mathematics
    • a number usually expressed in the form a/b.
    • a ratio of algebraic quantities similarly expressed.
  2. Chemistry(in a volatile mixture) a component whose range of boiling point temperatures allows it to be separated from other components by fractionation.
  3. a part as distinct from the whole of anything;
    portion or section:The meeting started with a fraction of us present.
  4. a very small part or segment of anything;
    minute portion:Only a fraction of the work was completed on time.
  5. a very small amount;
    a little bit:It was only a fraction away from completion.
  6. a piece broken off;
    fragment or bit.
  7. the act of breaking.
  8. Religion[Eccles.](in a Eucharistic service) the breaking of the Host.

v.t., v.i. 
  1. to divide or break into fractions, sections, factions, etc.:Dissension threatens to fraction the powerful union.
  • Late Latin frāctiōn- (stem of frāctiō) a breaking (in pieces), equivalent. to Latin frāct(us) (past participle of frangere to break) + -iōn- -ion
  • Middle English fraccioun 1350–1400
    • 3, 6.See corresponding entry in Unabridged See  part. 

Collins Concise English Dictionary © HarperCollins Publishers::
fraction /ˈfrækʃən/ n
  1. a ratio of two expressions or numbers other than zero
  2. any part or subdivision
  3. a small piece; fragment
  4. a component of a mixture separated by a fractional process, such as fractional distillation
  5. the formal breaking of the bread in Communion
Etymology: 14th Century: from Late Latin fractiō a breaking into pieces, from Latin fractus broken, from frangere to break
'fraction' also found in these entries:

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