# quantum

> English word · Noun · IPA /ˈkwɒntəm/ · frequency rank #6,402

## Definitions
1. The total amount of something; quantity.
2. The total amount of something; quantity.
3. The total amount of something; quantity.
4. The amount or quantity observably present, or available.
5. The smallest possible, and therefore indivisible, unit of a given quantity or quantifiable phenomenon.
6. The amount of time allocated for a thread to perform its work in a multithreaded environment.
7. Ellipsis of quantum computing.
8. The minimum dose of a pathogen required to cause an infection.
9. A definite portion of a manifoldness, limited by a mark or by a boundary.

## Etymology
From Late Latin quantum, noun use of neuter form of Latin quantus (“how much”).

## Easily confused with
- **quant** (https://plainspell.com/en/vs/quant-vs-quantum)

## Common misspellings (10)
`qauntum`, `qquantum`, `quanntum`, `quantmu`, `quanttum`, `quantumm`, `quanutm`, `quatnum`, `qunatum`, `uqantum`

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