the former capital and 2nd largest city of Brazil; chief Brazilian port; famous as a tourist attraction
"After visiting the vibrant beaches, we headed to Rio for its world-famous Carnival parade."
Alternative form of riyō (“Japanese ounce”)
"During the briefing, Rio confirmed that all our aircraft had successfully intercepted the incoming radar signals before they could reach friendly airspace."
A grade of Spanish saffron, in quality below mancha and coupé but above standard and sierra.
Initialism of radar intercept officer.
In plain English: A rio is just another word for a river, especially one that flows through South America.
"The Rio Grande forms the border between Mexico and the United States."
Usage: Rio is the third-highest grade of Spanish saffron, ranking just below Mancha and Coupé while exceeding Standard and Sierra in quality. Use this term specifically when discussing premium culinary ingredients or authentic Spanish textile dyes derived from high-grade crocus flowers.
Clipping of Rio de Janeiro.
"She booked a flight to Rio for her summer vacation, excited to see Christ the Redeemer up close."
From Latin rīvus, meaning "stream" or "brook," the term entered English via Spanish to denote any river. It retains its original sense of flowing water in both languages.