# by Jupiter

> English word · Interjection

## Definitions
1. Invocation of the Roman god Jupiter.
2. Minced oath for by God.

## Etymology
From Latin pro Iuppiter. Ellipsis of a full oath of the form "I swear by Jupiter that…". Originally a literal oath; later a minced oath.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/by-jupiter