# FFI

> English word · Noun · frequency rank #80,452

## Definitions
1. Initialism of fatal familial insomnia.
2. Initialism of foreign function interface.

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