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Meaning of binary

bi•na•ry

Pronunciation: (bī'nu-rē, -ner-ē), [key]
— adj., n., pl. -ries.
—adj.
  1. consisting of, indicating, or involving two.
    1. of or pertaining to a system of numerical notation to the base 2, in which each place of a number, expressed as 0 or 1, corresponds to a power of 2. The decimal number 58 appears as 111010 in binary notation, since 58 = 1 × 25 + 1 × 24 + 1 × 23 + 0 × 22 + 1 × 21 + 0 × 20.
    2. of or pertaining to the digits or numbers used in binary notation.
    3. of or pertaining to a binary system.
    4. (of an operation) assigning a third quantity to two given quantities, as in the addition of two numbers.
  2. noting a compound containing only two elements or groups, as sodium chloride, methyl bromide, or methyl hydroxide.
  3. (of an alloy) having two principal constituents.
—n.
  1. a whole composed of two.
  2. See
  3. Also calleda number expressed in the binary system of notation.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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