An adoption in which the biological mother/biological parents and the adoptive family know each other's identities, and choose to remain in contact after the adoption process is finalized.

plural of open adoption

plural of open circuit

(organic chemistry) Having carbon atoms arranged in a linear rather than cyclical chain.

an incomplete electrical circuit through which no current can flow

A place of employment in which employment is in no way contingent on membership in a union, though a union may be the exclusive bargaining agent of the employees.

plural of open tuning

Synonym of open-neck

(video games) A gameworld that the player may traverse freely, rather than being restricted to certain predefined areas and quests.

plural of open world