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3 definitions found
 for parity bit
From The Collaborative International Dictionary of English v.0.48 :

  parity bit \par"i*ty bit`\, n. (Computers)
     The bit within a data structure which is assigned a value of
     1 or 0 so as to make the parity[7] of the data structure odd
     or even. Data structures may or may not have parity bits,
     dpending on whether the system does or does not perform
     parity checking. The most commonly used parity bit is the
     eigth (higher-order) bit of a byte, which is used when data
     transmission uses only the 7 lower-order bits of each byte as
     significant data; some memory systems use a ninth bit as a
     parity bit for each eight bits (one byte) of significant data
     in memory.
     [PJC]

From WordNet (r) 3.0 (2006) :

  parity bit
      n 1: (computer science) a bit that is used in an error detection
           procedure in which a 0 or 1 is added to each group of bits
           so that it will have either an odd number of 1's or an even
           number of 1's; e.g., if the parity is odd then any group of
           bits that arrives with an even number of 1's must contain
           an error [syn: parity bit, parity, check bit]

From The Free On-line Dictionary of Computing (30 December 2018) :

  parity bit
  
      An extra bit added to a byte or
     word to reveal errors.
  
     See parity.
  
     (1996-03-01)
  

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