[oh-puh n-air] /ˈoʊ pənˈɛər/
existing in, taking place in, or characteristic of the open air; outdoor:
The orchestra gave three open-air concerts last summer.
noun 1. an arrangement in which contact is maintained or allowed between a child’s adoptive and biological parents.
noun 1. an unrestricted competitive market in which any buyer and seller is free to participate. noun 1.
- Open-market operations
plural noun 1. (finance) the purchase and sale on the open market of government securities by the Bank of England for the purpose of regulating the supply of money and credit to the economy
noun 1. a marriage in which the partners agree that each is free to have sexual relationships with other partners. noun 1. a marriage in which the partners are free to pursue their own social and sexual lives