Семантична интерпретация на проблеми, свързани с категорията определеност/неопределеност (върху материал от българския и полския език)

The paper discusses some basic problems concerning the semantic interpretation of the category determination/non-determination. A solution was found out as regards the basic semantic opposition defined as an opposition of singularity/non-singularity. Some lexical and morphological means for expressing this opposition are analysed across the two languages. Drawing a clear-cut distinction among the means for expressing singularity and non-singularity (general and existential) in natural languages should be of importance not only as a theoretical insight into this particular category, but it can also be efficiently applied to the practical studies of the two languages under discussion.