Full assembly for formal discussion.

In the Roman Catholic Church, a plenary council is any of various kinds of ecclesiastical synods, used when those summoned represent the whole number of bishops of some given territory.

Complete remission of temporal punishment.

Full divine guidance of scripture.

A talk during a conference or similar meeting that is scheduled at a time when everyone can attend, e.g. at a time when nothing else is scheduled.

A plenary power or plenary authority is a complete and absolute power to take action on a particular issue, with no limitations.

an alternate form of adoption which terminates the relationship between birth parent and child.

an independent long term investor, developer and manager of public infrastructure, specialising in public–private partnerships.