Adjective
1. contrary to rule or accepted order or general practice;
"irregular hiring practices"2. (of solids) not having clear dimensions that can be measured; volume must be determined with the principle of liquid displacement
3. not occurring at expected times
4. used of the military; not belonging to or engaged in by regular army forces;
"irregular troops""irregular warfare"5. deviating from what is usual or common or to be expected; often somewhat odd or strange;
"these days large families are atypical""highly irregular behavior"6. lacking continuity or regularity;
"an irregular worker""employed on a temporary basis"7. of a surface; not level or flat;
"walking was difficult on the irregular cobblestoned surface"8. used of independent armed resistance forces;
"guerrilla warfare""partisan forces"9. independent in behavior or thought;
"she led a somewhat irregular private life""maverick politicians"