frequent, regular | annual, biennial, half-yearly, monthly, quarterly, weekly, etc. | all-day, hour-long, two-hour, etc. | afternoon, breakfast, lunchtime, weekend, etc. | full, plenary | formal, informal | inaugural | mass | open-air | open, public | closed, private | secret
joint
The two companies held a joint meeting to discuss their new partnership plans.
general
The company called a general meeting to discuss the new safety rules with all employees.
face-to-face, personal | bilateral, trilateral, tripartite | high-level, summit, top-level | exploratory, initial, introductory, preliminary, preparatory | follow-up | extraordinary, special | crisis, emergency, urgent | crucial, decisive, key, vital | impromptu | pre-inquiry, pre-session, pre-summit, etc. | post-election, post-results, etc. | board, cabinet, committee, council, departmental, family, ministerial, shareholders', staff, team, union | inter-governmental, inter-ministerial, inter-party, inter-tribal, etc. | business | political | discussion