from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A number that is rational or irrational, not imaginary.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An element of the set of real numbers.; the set of real numbers include the rational numbers and the irrational numbers, but not all complex numbers.
  • n. A floating-point number.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any rational or irrational number


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