plural johnnies
1
often Johnny : fellow, guy
2
: a short-sleeved collarless gown that is open in the back and is worn by persons (such as hospital patients) undergoing medical examination or treatment

Word History

Etymology

from the name Johnny

First Known Use

1648, in the meaning defined at sense 1

Time Traveler
The first known use of johnny was in 1648

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Cite this Entry

“Johnny.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/johnny. Accessed 19 Aug. 2026.

Medical Definition

johnny

noun
john·​ny
variants also johnnie or johnny gown
plural johnnies also johnny gowns
: a loose robe that is usually open in the back and is worn by patients in a medical facility (such as a hospital) : hospital gown
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