A "rainha" is the Portuguese word for "queen," referring to a female monarch who rules a kingdom or territory. Queens often hold significant power and influence, either as reigning monarchs or as consorts to kings. Their roles can vary widely depending on the country's traditions and laws. In many cultures, a rainha symbolizes authority, grace, and leadership. She may be involved in political decisions, represent her nation in diplomatic matters, and participate in ceremonial functions. Famous historical rainhas include Elizabeth I of England and Catherine the Great of Russia, both known for their impactful reigns.