This paper intends to lay the foundations for a relevance-theoretic approach to the diminutive morpheme. In many languages, this morpheme is attached to nouns, adjectives, adverbs or verbs. It frequently nuances their referents by providing information concerning the smallness, littleness or scarcity of the size, amount or degree of their referents. However, the semantics of this morpheme cannot always be connected with such notions. In Spanish, for example, it is often used in order to intensify, express approximation or pejoration, show affection or modesty, suggest intimacy or mitigate verbal actions. This variety of functions renders its semantics fairly elusive and rules out a conceptual analysis. Relying on the relevance-theoretic distinction between conceptual and procedural meaning, this paper argues that the diminutive might possess a procedural semantics amounting to procedures or processing instructions. It also considers the output(s) of such procedures in Spanish and shows that in several cases the diminutive would clearly contribute to the lexical pragmatic processes taking place during mutual parallel adjustment . These yield highly idiosyncratic conceptual representations. In other cases, the instructions encoded by the diminutive could be thought to trigger a representation of the speaker’s psychological states or even contribute to what in relevance-theoretic pragmatics is known as the higher-level explicature of an utterance. Since this would involve admitting that the semantics of the diminutive could be poly-procedural , this paper concludes by wondering whether a unitary procedural approach would be preferable.