red
The Italian word 'rosso' means 'red' in English. It is used in the same way you would use 'red' in English, to describe the color of an object, such as a car or a dress. For example, 'La mia macchina è rossa' means 'My car is red'.
The red flower is very beautiful.
This sentence demonstrates how to use 'rosso' as an adjective to describe a noun, in this instance, a flower. The adjective comes after the noun in Italian, hence 'fiore rosso' instead of 'rosso fiore'.
I want a red apple, please.
This sentence makes use of 'rosso' as an adjective to describe a desired object, in this case, an apple. Similar to English, 'per favore' is used to politely request something.
The red light indicates stop.
In this sentence, 'rosso' is used to describe a traffic signal. Just as in English, traffic rules associate the color red with stopping. This is an example of how cultural concepts can cross linguistic barriers.