Le chat dort.
English: The cat is sleeping.
Definite articles in French are small words used before nouns to talk about a specific person, thing, or group that is known to both the speaker and listener.
Use definite articles in French when you are talking about something specific or already known, like a particular object, person, or group. Also, use them when talking about things in general, such as likes or dislikes, or when referring to categories (for example, animals, languages, days of the week).
Le chat dort.
English: The cat is sleeping.
La voiture est rouge.
English: The car is red.
L'élève écoute.
English: The student is listening.
Les pommes sont sucrées.
English: The apples are sweet.