# A3

> English word · Noun · frequency rank #19,748

## Definitions
1. A one-page document, often tabular or graphical, on such paper.
2. A3 class, a class of steam locomotive used on the London and North Eastern Railway.

## Etymology
See the Wikipedia article ISO 216, the international standard on paper sizes.

## Easily confused with
- **as** (https://plainspell.com/en/vs/a3-vs-as)
- **at** (https://plainspell.com/en/vs/a3-vs-at)
- **an** (https://plainspell.com/en/vs/a3-vs-an)
- **AM** (https://plainspell.com/en/vs/a3-vs-am)
- **AL** (https://plainspell.com/en/vs/a3-vs-al)
- **AD** (https://plainspell.com/en/vs/a3-vs-ad)
- **ah** (https://plainspell.com/en/vs/a3-vs-ah)
- **AP** (https://plainspell.com/en/vs/a3-vs-ap)
- **AC** (https://plainspell.com/en/vs/a3-vs-ac)
- **ai** (https://plainspell.com/en/vs/a3-vs-ai)
- **aw** (https://plainspell.com/en/vs/a3-vs-aw)
- **AR** (https://plainspell.com/en/vs/a3-vs-ar)
- **AU** (https://plainspell.com/en/vs/a3-vs-au)
- **AA** (https://plainspell.com/en/vs/a3-vs-aa)
- **AF** (https://plainspell.com/en/vs/a3-vs-af)
- **ag** (https://plainspell.com/en/vs/a3-vs-ag)
- **AK** (https://plainspell.com/en/vs/a3-vs-ak)
- **AZ** (https://plainspell.com/en/vs/a3-vs-az)
- **av** (https://plainspell.com/en/vs/a3-vs-av)
- **ay** (https://plainspell.com/en/vs/a3-vs-ay)

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/a3