1. A shape or form that does not have uniform or symmetrical proportions; lacking regularity in outline or structure
The coastline of the island has an irregular shape with many inlets and peninsulas.
A costa da ilha tem uma forma irregular com muitas enseadas e península.
2. In geometry, a polygon or figure whose sides and angles are not all equal
The architect designed an irregular shape for the building's façade to create visual interest.
O arquiteto projetou uma forma irregular para a fachada do edifício criar interesse visual.