Abstract
Berkeley's theory of signification is explicated and analyzed. Signification: (1) replaces abstract general ideas in the recognition of similar ideas, (2) replaces causation as the relation between ideas of sense and their external sources, (3) replaces substance in the account of sensible objects. Its supposedly simple character cannot be maintained. There are at least three different kinds of signification: signification within categories, Signification across categories, And ontological signification. Berkeley's immaterialistic metaphysics, Relying heavily upon the theory of signification, Is fantastic but fascinating. It is important as a part of a continuous epistemological inquiry of almost two centuries