#1 ira n. [Irish Republican Army, IRA, Provisional Irish Republican Army, Provisional IRA, Provos] a militant organization of Irish nationalists who used terrorism and guerilla warfare in an effort to drive British forces from Northern Ireland and achieve a united independent Ireland. wn #2 ira n. [individual retirement account, IRA] a retirement plan that allows you to contribute a limited yearly sum toward your retirement; taxes on the interest earned in the account are deferred. wn #3 ira n. [wrath, anger, ire] belligerence aroused by a real or supposed wrong (personified as one of the deadly sins). wn