Abstract
Thick terms, which express value concepts with significant descriptive content, have aroused a lot of controversial issues, among which the contextual variability of evaluation is the most disputed one. This paper argues that the semiotic notion of verbal medium and its workings can explain away this variability problem. We will first present this variability problem. Second, we will argue that thick terms should be regarded as verbal medium that is both a meaning-carrying substance and a meaning carrier. Third, we will discuss the conventional evaluation of thick terms as a meaning carrier. Special attention is given to the semiotic analysis of evaluative variability of thick terms. Finally, we will diagnose the mistakes of some philosophical views about the variability argument concerning thick terms.