Meanings
nounbutter bar (plural butter bars)
plural butter bars · alternative butterbar
- slangUS Air Force; US Army; US Marines; US Air Force; US Army; US MarinesA second lieutenant.
- NavyUSslangUS Coast GuardAn ensign.
Origin
Derived from the insignia of an O-1 in the US Military, which consists of a single yellow bar.
Full word history & related roots →Translations
Finnish vänskä, aliluti
- vänskäSecond Lieutenant
- alilutiSecond Lieutenant
Cite this entry
APA
butter bar. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/butter%20bar
MLA
“butter bar.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/butter%20bar. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “butter bar,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/butter%20bar.
Source: butter bar on Wiktionary, CC BY-SA 4.0.