noun pl. parities -·ties

1. the state or condition of being the same in power, value, rank, etc.; equality
2. resemblance; similarity
3. equivalence in value of one currency expressed in terms of another country's currency
4. equality of value at a given ratio between different kinds of money, commodities, etc.
5. ☆ a price for certain farm products, usually maintained by government price supports, designed to keep the purchasing power of the farmer at the level of a designated base period
6. Math. the condition existing between two integers that are both odd or both even
7. Physics a symmetry property of a wave function: expressed as +1 if no difference can be detected between the wave function and its mirror image, and as -1 if the wave function is changed only in sign

Etymology: Fr parité < L paritas < par, equal: see par