CISA (noun)
A US Department of Homeland Security agency tasked with supporting cyber and physical security for US critical infrastructure.
CyberWire Glossary link
Audio reference link: CISA, 2021. CISA Director Jen Easterly’s Keynote at Black Hat USA 2021 [Video]. YouTube. URL https://www.youtube.com/watch?v=q7bu-L-m4K4.