The paper provides an interpretation of Putnam’s internal realism which is usually interpreted as an anti-realist and anti-metaphysical ontological view. In opposition to this view, the paper argues that internal realism – as Putnam explicitly said – is a «metaphysical substantive theory» of truth. In order to understand this interpretation, the matter ought to be approached starting from Putnam’s theory of meaning. Indeed, Putnam proposes internal realism as a general theory of interaction between speakers and environment – a «theory of the world» – one in which the dichotomy between meaning as use and correspondence is well understood. The paper will firstly introduce Putnam’s theory of meaning as articulated in the Philosophical ...