Definitions:

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 noun
   • 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
2. (mathematics) a relation between a pair of integers: if both integers are odd or both are even they have the same parity noun
   • if one is odd and the other is even they have different parity
3. in obstetrics, the number of liveborn children a woman has delivered noun
   • The parity of the mother must be considered.

Synonyms:

• check bit
• conservation of parity
• mirror symmetry
• para
• parity bit
• space-reflection symmetry