1
- unqualified; absolute无限制的, 完全的; 绝对的：
crusaders were offered a plenary indulgence by the Pope.
十字军战士被罗马教皇赋予了罪罚全免权。
2
- (of a meeting) to be attended by all participants at a conference or assembly, who otherwise meet in smaller groups（会议）全体出席的：
a plenary session of the European Parliament.
欧洲议会全体会议。
- a meeting or session of this type全会, 全体大会。
词源
late Middle English: from late Latin plenarius 'complete'， from plenus 'full'.