# ARPA

> English word · Proper noun · IPA /ˈɑɹ.pə/ · frequency rank #66,471

## Definitions
1. Acronym of Advanced Research Projects Agency, renamed to DARPA in 1972.
2. Initialism of Automatic Radar Plotting Aid.
3. Acronym of American Rescue Plan Act.
4. Initialism of Association for Reformed Political Action.

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