say it: PLEN-ur-ee
plenary is an adjective meaning "full in all respects". It carries one recorded sense.
full in all respects
“a plenary session of the legislature”
“a diplomat with plenary powers”
Definitions, synonyms and semantic relations for plenary come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.