In this article the role of terms and professionalisms in fiction is investigated. A terminological system is a set of terms and professionalisms used in different branches of science and technology. Inside each terminological system, all terms and professionalisms are regulated and standardized. According to the traditional view a fiction book is a complex, multi-faceted creation that will be studied from different points of view and with different purposes. Dialectal words, terms, slang, colloquial words and expressions, neologisms, archaisms, foreign words, etc. are studied from the point of view of their interactions with different contexts. In the process of investigation the author analyzes the use of terms and professionalisms in A. Heiley’s novel “Airport”. The author comes to the conclusion that the use of terms and professionalisms is very important in fiction language because the words, and particularly terms, reveal their meaning in the context. All examples are taken in context – this helps understand the nature of terms and professionalisms inside the language system they’re put in.