0 the form of a verb that usually ends with ‘-ed’ For example ‘walked’ is the past participle of ‘walk’. -- participio passato
1 the form of a verb that is used with the verb ‘have’ to form perfect tenses, and with the verb ‘be’ to form passive sentences. Past participles are also sometimes used as adjectives, for example ‘injured’ as in ‘an injured shoulder’. -- participio passato