real number

[ ree-uh l, reel ]
/ ˈri əl, ril /

noun Mathematics.

a rational number or the limit of a sequence of rational numbers, as opposed to a complex number.

Nearby words

  1. real estate,
  2. real income,
  3. real life,
  4. real line,
  5. real mccoy, the,
  6. real part,
  7. real presence,
  8. real property,
  9. real storage,
  10. real tennis

Origin of real number

First recorded in 1905–10

Also called real.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for real number

real number

noun

a number expressible as a limit of rational numbersSee number (def. 1)
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

Science definitions for real number

real number

[ rēəl ]

A number that can be written as a terminating or nonterminating decimal; a rational or irrational number. The numbers 2, -12.5, 37, and pi (π) are all real numbers.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.