# burden of proof

> English word · Noun

## Definitions
1. 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; the onus probandi.
2. The obligation of the person making a claim in a dispute to provide sufficient evidence for their position.

## Etymology
Calque of Latin onus probandi.

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