: classification as unfit for military service
also : a person having this classification

Word History

First Known Use

1942, in the meaning defined above

Time Traveler
The first known use of 4-F was in 1942

Dictionary Entries Near 4-F

Cite this Entry

“4-F.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/4-F. Accessed 27 Feb. 2024.

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