from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The mass murder of European Jews by the Nazis during World War II.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. The systematic mass murder of 6 million Jews perpetrated by Nazi Germany shortly before and during World War II.
Hebrew šô'â, calamity; see šwא in Semitic roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From the Hebrew word שואה ("catastrophe"). (Wiktionary)