In modern terminology, an acid is implicitly a Brønsted acid and not a Lewis acid, since chemists almost always refer to a Lewis acid explicitly as a Lewis acid.
ɪn mˈɑːdɚn tˌɜːmɪnˈɑːlədʒi, ɐn ˈæsɪd ɪz ɪmplˈɪsɪtli ɐ bɹˈɑːnstᵻd ˈæsɪd ænd nˌɑːɾə lˈuːɪs ˈæsɪd, sˈɪns kˈɛmɪsts ˈɔːlmoʊst ˈɔːlweɪz ɹᵻfˈɜː tʊ ɐ lˈuːɪs ˈæsɪd ɛksplˈɪsɪtli æz ɐ lˈuːɪs ˈæsɪd.