1. In a manner that is not regular, even, or consistent; without following a fixed pattern or schedule
The buses arrive irregularly, sometimes every 10 minutes and sometimes every 30.
Os ônibus chegam irregularmente, às vezes a cada 10 minutos e às vezes a cada 30.
2. Not in accordance with rules, standards, or established procedures
The company was operating irregularly without proper licenses.
A empresa estava operando irregularmente sem licenças adequadas.
3. In a way that is uneven or asymmetrical in form or arrangement
The tiles were placed irregularly across the floor.
Os azulejos foram colocados irregularmente no chão.