Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Late Latin
Origin: plenarius, from Latin plenus; PLENTY3

plenary

 adjective
     
Related topics: Government
ple‧na‧ry [only before noun] formal
1PG involving all the members of a committee, organization etc:
The conference ended with a plenary debate.
2 plenary powers are complete powers with no limit:
He was given plenary powers to negotiate with the rebels.
—plenary noun [countable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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