Abstract: The purpose of this paper is to explore why the "Meaning Triad" becomes the core concept of the Significs, and reaches the following conclusions: the "Meaning Triad" is the basic theory of Significs, which, as the science of meaning, is the basis of the extension of the Significs's "translative-interpretive" process, the premise that makes the Significs evolved into "the philosophy of Significance", the crux that makes the Significs to restore the link between "mother-sense" and "father-reason", the epitome of the Significs's thinking manner, and the central doctrine of signific education. Assisted by the concept of the "Meaning Triad", Lady Welby's Signifcs ultimately establishes the importance of context, highlights the philosophy of "dialogue" and "otherness", combines Semiotics with Axiology, emphasizes the capacity of mankind for responsibility of behavior in the use of signs, and brings the Significs with an ethic inclination. Explicating the important role played by the "Meaning Triad" in Significs may contribute to our understanding of the characteristics of Significs theory, which on the other hand will deepen our understanding about Significs.

Key words: Lady Welby, Significs, the meaning triad, sense, meaning, significance, interpretive-translative process