# nullity

> English word · Noun · frequency rank #91,872

## Definitions
1. The state of being null, or void, or invalid.
2. A void act; a defective proceeding or one expressly declared by statute to be a nullity.
3. The dimension of the kernel of a linear transformation; the dimension of the nullspace of a matrix.

## Etymology
From Middle French nullité and its etymon Medieval Latin nūllitās, from Latin nūllus. By surface analysis, null + -ity.

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