# immunisation

> English word · Noun · frequency rank #55,508

## Definitions
1. Alternative spelling of immunization.
2. The process of immunising signalling and traction power supplies so they don't interfere with each other.

## Etymology
From French immunisation. Equivalent to immunise + -ation or immune + -isation.

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