The phrase "addressed the plenary" is correct and usable in written English.
It can be used when referring to someone speaking or presenting to a large group or assembly, typically in a formal setting.
Example: "During the conference, the keynote speaker addressed the plenary with insights on climate change."
Alternatives: "spoke to the plenary" or "presented to the plenary".
Prime Minister Junichiro Koizumi of Japan addressed the plenary as well, and His Royal Highness Prince Hassan bin Talal of Jordan moderated the proceedings.
Prince Michael of Kent, a member of the British royal family who is active in charitable causes, addressed the plenary session together with UNICEF Representative in Russia Carel de Rooy.
Ms. Veneman also participated in the opening ceremony of the full World Assembly on 26 August and addressed the plenary session – which included an audience of some 2,000 religious leaders from all over the world.
You can see Mr. Sano addressing the plenary of the working group dedicated to the increasingly ineffective Kyoto agreement above and here.
Addressing the plenary of the Gulf Cooperation Council (GCC) in Manama, May will say she is realistic about the threat Iran poses in the Gulf and the wider region, and prepared to "confront state actors whose influence fuels instability".
And children will address the plenary of the UN General Assembly.
In his speech addressing the Plenary Hall, the Director-General noted "We need to put in place food systems that provide healthy and nutritious food that are accessible and affordable for everyone," underlining that Zero Hunger is not only about feeding but also about nourishing people.
Secretary General Ban Ki-moon is set to address the plenary of the European Parliament on the occasion of the vote.
European Parliament President Martin Schulz, European Council President Donald Tusk and Commission President Jean-Claude Juncker will address the plenary session at the start of the meeting.
The Portuguese Prime Minister was the third EU leader to address the plenary on the future of Europe, after Irish Taoiseach Leo Varadkar on 17 January and Croatian Prime Minister Andrej Plenković on 6 February.
Addressing the plenary on Tuesday Marianne Thyssen (EPP, BE), rapporteur for the text entrusting the ECB with bank supervisory powers, said: "displacing powers from the national level must go hand in hand with creating accountability at the EU level".
