This article contrasts the concepts of indeterminacy and well-formedness on the one hand, and the concepts of vagueness and exactness on the other hand. The further distinction between determination (degree of vagueness) and specification (degree of generality) is exemplified with the genitive deverbal noun construction in Norwegian. Various approaches to the concept of context are discussed and the paper applies Kubińsky’s vagueness model to demonstrate that there are some areas of grammar, such as the categorial status of the parts of speech, where the question of membership very seldom arises, although gradience is present.