This article highlights the conceptual correlation of „authentic polyphony” and the chronotopic terms „objective plan-world (outer, extrinsic)” and „represented planworld (artistic, intrinsic)” and, on the other hand, the „platform-sphere of meanings”. These terms literalize the conceptual content of the universal ontological term heteromundanity. We analyze the „conventional” („metaphorical”) utilization of the musicological term polyphony in the context of the Bakhtinian concept „term”, based on the ontological view of dialogicality of the specific object of humanities, of the literary science in particular, determining „the philosophy of the terminological expression”. It determines implicitly the specific hermeneutics of the literary notions’ interpretation which vises the „active understanding” (creator of new meanings) of bivocity and heterovocity of the word-utterance (text-sentence) by the „authentic reader” of the dialogical novel (polyphonic).