If the appellate court does find a legal defect in the decision "below" (i.e., in the lower court), it may "modify" the ruling to correct the defect, or it may nullify ("reverse" or "vacate") the whole decision or any part of it.
ɪf ðɪ ɐpˈɛlət kˈoːɹt dˈʌz fˈaɪnd ɐ lˈiːɡəl dˈiːfɛkt ɪnðə dᵻsˈɪʒən "bᵻlˈoʊ" ˈaɪ.ˈiː., ɪnðə lˈoʊɚ kˈoːɹt, ɪt mˈeɪ "mˈɑːdᵻfˌaɪ" ðə ɹˈuːlɪŋ tə kɚɹˈɛkt ðə dˈiːfɛkt, ɔːɹ ɪt mˈeɪ nˈʌlᵻfˌaɪ"ɹᵻvˈɜːs" ɔːɹ "vˈeɪkeɪt"ðə hˈoʊl dᵻsˈɪʒən ɔːɹ ˌɛni pˈɑːɹt ʌv ɪt.