# IDEF

> English word · Proper noun

## Definitions
1. Initialism of International Defence Industry Fair.
2. A family of modelling languages in the field of systems and software engineering.

## Etymology
Initialisms. The software-engineering term originally stood for ICAM definition but was given the new expansion integration definition in 1999.

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