Definition of parity

• (obstetrics) the number of liveborn children a woman has delivered; "the parity of the mother must be considered"; "a bipara is a woman who has given birth to two children"
• (mathematics) a relation between a pair of integers: if both integers are odd or both are even they have the same parity; if one is odd and the other is even they have different parity; "parity is often used to check the integrity of transmitted data"
• (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 1s or an even number of 1s; e.g., if the parity is odd then any group of bits that arrives with an even number of 1s must contain an error