French language Q&A Forum

The wording in the article implies that this rule only applies to plural nouns/adjectives, but the title does not state that. Could "plural" be added to the title as well to match?

I don't understand how the example "Le disque jaune" can mean "The amber light". Jaune=yellow, so I accept it can also mean amber. But how can disque mean light, doesn't it normally mean disc? This can however be a thing i haven't learned in English, as neither English nor French is my native language.