noun, U.S. Politics.
a party convention at which delegates are free to vote for the candidate of their choice.
noun 1. a couplet that concludes with a run-on line.
- Open court
noun 1. a court or trial to which members of the public are freely admitted
noun, Mathematics. 1. a cover of a set consisting entirely of open sets.
[oh-puh n-kuht] /ˈoʊ pənˌkʌt/ adjective, Mining. 1. noting or pertaining to a type of surface mining in which coal and other flat-lying mineral deposits are removed by the excavation of long, narrow trenches.