This chapter describe Meaning Equivalence (ME), Boundary of Meaning (BoM), and Granularity of Meaning (GoM). Meaning Equivalence (ME) is a polymorphous - one-to-many - transformation of meaning that signifies the ability to transcode equivalence-of-meaning through multiple representations within and across sign systems, and multiple definitions of a concept in multiple sign systems. Boundary of Meaning (BoM) is the boundary between two mutually exclusive semantic spaces in the sublanguage: (i) semantic space that contains only representations that do share equivalence-of-meaning with the Target Statement (TS); and (ii) semantic space that contains only representations that do not share equivalence-of-meaning with the TS. Granularity of Meaning (GoM) is the deepest level in which lexical label of a co-occurring subordinate concept appears in the Target Statement. It is therefore a measure of the ‘depth of exploration' of building blocks of a super-ordinate concept in TS. Boundary of Meaning (BoM) and Granularity of Meaning (GoM) are concepts in Pedagogy for Conceptual Thinking, a novel teaching and learning methodology in the digital age (Etkind, Kenett & Shafrir, 2016). These constructs describe important aspects of learning outcomes.