# ZF

> English word · Noun · frequency rank #63,390

## Definitions
1. Initialism of Zermelo-Fraenkel (set theory): a particular axiomatic formulation of set theory without the axiom of choice.

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