This paper explores the semantic nature of Korean bare NPs affixed by certain nominal markers suchas the topic –nun, the nominative –ga, the accusative –lul, and the null case -ø. It is quite clear that the specificityinterpretation of Korean bare NPs correlates with their nominal markers. I propose here that depending ontheir semantic strength, the nominal markers can be classified into three subtypes; namely, strong, weak, andweakest. The strong marker -nun, in particular, always triggers a specific reading of bare NPs while the weakestmarker -ø can never get a specific reading. The weak markers, -ga and –lul, can induce either a specific readingor a non-specific reading, according to the previous discourse context. On the other hand, I presents a phasebasedmultiple spellout approach to the specificity of bare NPs. Following Diesing’s (1992) MappingHypothesis, I assume that specific NPs are structurally higher than non-specific NPs. More specifically, I suggesthere that if a head of phase (e.g. C or little v) carries an uninterpretable strong feature (i.e. [-Spec]), everybare NP bearing a specificity feature should be internally merged to the edge of the phase, and hence it has aspecific reading. In contrast, bare NPs remaining in the spellout domain of a phase (e.g. TP or VP) must be interpretedas non-specific. That is, the spellout domain is an crucial semantic boundary between specific andnon-specific bare NPs.