In this paper, we will focus our attention on two basic semantic notions: linguistic expression and relation of synonymy (lexical synonymy). We will try to analyze the notions in three semantic fields: logic, linguistic, and pragmatic (F. Recanati), and see whether these three fields can provide us with satisfactory solutions. We will show that the pragmatic conception of semantics is not satisfactory in explaining neither the notion of linguistic expression nor the notion of synonymy - two very basic semantic notions; which could be done in logical and linguistic semantics. and Barbora Geistová Čakovská