# onus probandi

> English word · Noun

## Definitions
1. The burden of proof, the onus; the duty of a party in a legal proceeding to prove an assertion of fact; it includes both the burden of production and the burden of persuasion.

## Etymology
Borrowed from Latin onus probandī.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/onus-probandi