This is the 1323rd most frequent Catalan word.
roja
"Roja" means "red" in English.
Adjective describing the color of a noun, 'apple', in feminine singular form.
La poma és roja.
The apple is red.
Adjective used in a metaphorical sense representing one aspect or emblem related to an object, 'flag', gendered feminine.
La senyera roja onejava al vent.
The red flag waved in the wind.
Adjective used figuratively to describe the seriousness of a situation marked by a symbol, 'alert', grammatically feminine.