# obturation

> English word · Noun

## Definitions
1. The act of stopping up, or closing, an opening.
2. The process of a bullet expanding under pressure to fit the bore of the firearm, or a cartridge case expanding under pressure to seal the chamber.

## Etymology
From Latin obtūrātiō. Compare French obturation.

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