IRA noun

1. the IRA /ˌaɪ ɑːr ˈeɪ/ (the Irish Republican Army) an illegal organization that wants to unite Northern Ireland and the Republic of Ireland ⇒ Sinn Fein

2. [countable] (also individual retirement account /'aɪrə/ American English) a special bank account in which you can save money for your retirement without paying tax on it until later

[TahlilGaran] Dictionary of Contemporary English ▲

IRA
Individual Retirement Arrangement (IRS) 
Irish Republican Army

[TahlilGaran] Acronyms and Abbreviations Dictionary ▲