There are both indefinite and definite articles in Italian. There are four indefinite articles, selected by the gender of the noun they modify and by the phonological structure of the word that immediately follows the article. "Uno" is masculine singular, used before "z" ( or ), "s+consonant", "gn" (), or "ps", while masculine singular "un" is used before a word beginning with any other sound. The noun "zio" 'uncle' selects masculine singular, thus "uno zio" 'an uncle' or "uno zio anziano" 'an old uncle,' but "un mio zio" 'an uncle of mine'. The feminine singular indefinite articles are "una", used before any consonant sound, and its abbreviated form, written "un'," used before vowels: "una camicia" 'a shirt', "una camicia bianca" 'a white shirt', "un'altra camicia" 'a different shirt'. There are seven forms for definite articles, both singular and plural. In the singular: "lo", which corresponds to the uses of "uno"; "il", which corresponds to the uses with consonant of "un"; "la," which corresponds to the uses of "una"; "l'," used for both masculine and feminine singular before vowels. In the plural: "gli" is the masculine plural of "lo and l'"; "i" is the plural of "il"; and "le" is the plural of feminine "la" and "l"'.