dɪˈklɛn.ʃən ˌdɛklɪˈneɪʃən dɪˈklaɪn dɪˈklɪvɪti dɪˈsɛnt dɪˌtɪəɹɪəˈɹeɪʃən dəˌti.ɹi.əˈɹeɪ.ʃən fɔːl fɔl fɑl a class of nouns or pronouns or adjectives in Indo-European languages having the same (or very similar) inflectional forms the first declension in Latin a downward slope or bend process of changing to an inferior state the inflection of nouns and pronouns and adjectives in Indo-European languages