Aristotle's ontology places the universal (katholou) in particulars (kath' hekaston), things in the world, whereas for Plato the universal is a separately existing form which actual things imitate.
ˈæɹɪstˌɑːɾəlz ɑːntˈɑːlədʒi plˈeɪsᵻz ðə jˌuːnɪvˈɜːsəl kˈæθəlˌuː ɪn pɚtˈɪkjʊlɚz kˈæθ hˈɛkæstən, θˈɪŋz ɪnðə wˈɜːld, wˈɛɹæz fɔːɹ plˈɑːɾoʊ ðə jˌuːnɪvˈɜːsəl ɪz ɐ sˈɛpɹətli ɛɡzˈɪstɪŋ fˈɔːɹm wˌɪtʃ ˈæktʃuːəl θˈɪŋz ˈɪmᵻtˌeɪt.