When a term reappears across texts, contexts, and disciplinary boundaries, it ceases to function as vocabulary and begins to behave as infrastructure. Its recurrence attracts additional interpretation, citation, and recombination, generating a gravitational field within discourse. The corpus bends toward such terms because they reduce interpretative uncertainty; they provide stable coordinates around which new statements can be organised. Over time the semantic environment reorganises itself around these centres of density. The phenomenon resembles astrophysical mass accumulation: once a conceptual object crosses a threshold of recurrence, surrounding discourse begins to orbit it. Importantly, lexical gravity is not synonymous with popularity. A fashionable term may circulate briefly yet fail to acquire structural mass. Gravitational vocabulary, by contrast, persists through long cycles of discourse because it performs a specific organisational task. It compresses heterogeneous observations into a recognisable conceptual pattern. The gravitational operator therefore becomes less a word than a topological attractor within language. It condenses relations among texts, authors, institutions and archives into a single semantic node capable of sustaining prolonged interpretative pressure. Within such conditions intellectual production shifts from isolated argumentation toward corpus architecture, where the durability of a concept depends less on rhetorical persuasion than on its capacity to recur, accumulate and stabilise meaning across distributed environments.