| IR | (British) a board of the British government that administers and collects major direct taxes |
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| IR | a heavy brittle metallic element of the platinum group |
| IR | belligerence aroused by a real or supposed wrong (personified as one of the deadly sins) |
| IR | a self-funded retirement plan that allows you to contribute a limited yearly sum toward your retirement |
| IR | United States lyricist who frequently collaborated with his brother George Gershwin (1896-1983) |
| IR | a republic in the Middle East in western Asia |
| IR | a native or inhabitant of Iraq |
| IR | of or relating to Iraq or its people or culture |
| IR | a theocratic republic in the Middle East in western Asia |
| IR | a dispute over control of the waterway between Iraq and Iran broke out into open fighting in 1980 and continued until 1988, when they accepted a UN cease-fire resolution |
| IR | a native or inhabitant of Iran |
| IR | the modern Persian language spoken in Iran |