Abstract
In the present paper we shall first focus on Locke’s and Reid’s understanding of primary and secondary qualities, as these two approaches mark the main dividing line in interpreting this distinction. Next, we will consider some modern approaches to the distinction and try to answer the question of whether, from theperspective of what we know about perception of sensory qualities, Locke’s ontological interpretation or Reid’s epistemological approach to the distinction are tenable ideas. Finally, we will concentrate on the relation between language and qualities of objects and, on the basis of some adjectival systems in the world’s languages, see how languages render, or code, certain distinctions and qualities apparently obvious to our cognition.