Je vais au cinéma.
English: I am going to the cinema.
In French, 'articles contractés' are special forms that are created when the prepositions 'à' (to/at) or 'de' (of/from) combine with the definite articles 'le' or 'les'. This combination forms a single word.
You use these contracted articles when 'à' or 'de' comes before 'le' or 'les'. For example, when talking about going to a place (à + le) or talking about something belonging to someone (de + le).
Je vais au cinéma.
English: I am going to the cinema.
Nous parlons du livre.
English: We are talking about the book.
Elle revient des vacances.
English: She is coming back from the holidays.
Tu joues aux cartes.
English: You play cards.