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Definition of Spanish influenza
1. Noun. (pathology) An influenza pandemic that spread to nearly every part of the world between 1918 and 1920, killing from 20 to 100 million people. ¹
2. Noun. (alternative capitalization of Spanish influenza) ¹
¹ Source: wiktionary.com
Medical Definition of Spanish influenza
1. Influenza that caused several waves of pandemic in 1918-1919, resulting in more than 20 million deaths worldwide; it was particularly severe in Spain (hence the name), but now is thought to have originated in the U.S. As a form of swine influenza. (05 Mar 2000)