In a world increasingly shaped by the pervasive presence of artificial intelligence, algorithmic systems, and techno-scientific infrastructures, the very notion of communication is undergoing a transformation. This second volume in the Interdisciplinary Studies on Philology series, titled Redefining Communication in Posthuman Age, emerges from the recognition that traditional humanist frameworks are no longer sufficient to fully grasp the complexities of our present condition. Instead, it calls for a critical rethinking of communication across biological, technological, philosophical, and ethical domains - a rethinking grounded in philological precision and enriched by interdisciplinary inquiry. The impetus for this volume arises from the realization that the boundaries between human and machine, language and code, subject and interface are no longer distinct. The contributions collected here approach this fluid terrain with analytical rigor and conceptual innovation, reflecting the series' overarching aim to reconceptualize philology as a dynamic mode of critical thinking. The articles span a wide spectrum of topics, from posthuman aesthetics in film and literature to the ethics of artificial authorship and the cognitive stylistics of AI. By engaging with speculative fiction, cinematic representations, philosophical discourses, and digital technologies, the contributors illuminate how communication is being rewritten - both literally and figuratively - in the posthuman context.