nothing by mouth

Word History

Etymology

Latin nil per os

Dictionary Entries Near NPO

Cite this Entry

“NPO.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/NPO. Accessed 22 Jul. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!