Meanings
nounKeystoner (plural Keystoners)
plural Keystoners
- USgovernmentA member of the 28th Infantry Division (United States).
Origin
From keystone + -er, after the "Keystone State" (Pennsylvania) from whose National Guard it originated.
Full word history & related roots →Cite this entry
APA
Keystoner. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/Keystoner
MLA
“Keystoner.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Keystoner. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “Keystoner,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/Keystoner.
Source: Keystoner on Wiktionary, CC BY-SA 4.0.