1. The process or result of forming something that does not follow a standard, expected, or normal pattern
The irregular formation of crystals created unique patterns in the mineral.
A formação irregular de cristais criou padrões únicos no mineral.
2. In linguistics, the development of grammatical forms that deviate from regular morphological rules
The verb 'go' has an irregular formation in the past tense as 'went'.
O verbo 'ir' tem uma formação irregular no tempo passado como 'fui'.
3. In military or organizational contexts, an arrangement that does not conform to standard structural patterns
The troops advanced in an irregular formation across the terrain.
As tropas avançaram em uma formação irregular através do terreno.