Aristotle's claim that the soul is the form of a living being is meant to eliminate that possibility and thus rule out reincarnation.
ˈæɹɪstˌɑːɾəlz klˈeɪm ðætðə sˈoʊl ɪz ðə fˈɔːɹm əvə lˈɪvɪŋ bˌiːɪŋ ɪz mˈɛnt tʊ ᵻlˈɪmᵻnˌeɪt ðæt pˌɑːsəbˈɪlᵻɾi ænd ðˈʌs ɹˈuːl ˈaʊt ɹˌiːɪŋkɑːɹnˈeɪʃən.