• 1. The superlative expresses the fastest, the most elegant, the least interesting, and so on.
     In Italian, the superlative (il superlativo relativo) is formed by using the comparative with the definite article.
    definite article   +   più/meno   +   adjective
    Quella medicina è la meno costosa.      That medicine is the least expensive.
    Il dottor Bianchi è il più conosciuto.      Doctor Bianchi is the best known.
    2. When the superlative is accompanied by a noun, the construction of the sentence depends
    on whether the adjective normally precedes or follows the noun it modifies.
    Adjectives that follow:  
    article   +   noun   + più/meno   +   adjective
    È l'infermiera più simpatica                  She is the nicest nurse in the whole hospital.
    di tutto l'ospedale.
    Adjectives such as bello, bravo, buono, cattivo, which can precede the noun,
    follow the same word order in the superlative construction.
    Adjectives that precede article:
    article   +   più/meno   +   adjective   +   noun
    Quello è il più bell'ospedale della città,         That is the nicest hospital in town,
    con i più bravi dottori.                                    with the best doctors.
    3. In Italian another form of superlative, called teh superlativo assoluto, is formed by adding
    the suffixes - issimo, - issima, -issimi, -issime to the masculine plral of an adjective minus -i:
     grande:  pl. grandi --- grand-   grandissimo
    Il nuovo ospedale è grandissimo.         The new hospital is very big.
    Note that spelling changes that you have already learned will be reflected in forms of the superlativo assoluto.
    ricco: pl. ricchi --- ricch-   ricchissimo
    lungo: pl. lunghi --- lunch-   lunghissimo
    vecchio: pl. vecchi --- vecch-   vecchissimo