| IRR | of a surface |
|---|---|
| IRR | lacking continuity or regularity |
| IRR | deviating from what is usual or common or to be expected |
| IRR | contrary to rule or accepted order or general practice |
| IRR | (of solids) not having clear dimensions that can be measured |
| IRR | used of the military |
| IRR | behavior that breaches the rule or etiquette or custom or morality |
| IRR | not characterized by a fixed principle or rate |
| IRR | an irregular asymmetry in shape |
| IRR | irregular and infrequent or difficult evacuation of the bowels |
| IRR | in an irregular manner |
| IRR | in an irregular manner |