IRREGULAR
- a soldier not formally attached to a military body [n -S]
- Not even or balanced in shape or arrangement
- (of a flower) Having the petals differing in size and shape; zygomorphic
- Contrary to the rules or to that which is normal or established
- Occurring at uneven or varying rates or intervals
- (of troops) Not belonging to regular or established army units
- (of a verb or other word) Having inflections that do not conform to the usual rules