The article focuses on information war in media communication. The objective is to reveal the heuristics of a cognitive-discursive approach to the phenomenon with emphasis on the functioning of a complex conceptual structure in the media and its role in world representation. The cognitive-discursive method is employed. It is argued that it is strengthened by the corpus approach and the modelling method that in combination give a holistic view of the mental constructs of the discursive type. The material for the study comprises 101 texts retrieved from the English language quality press, time period is from 01.01.2010 till 11.10.2019. The authors introduce the notion of discourse-world of information war. It is defined as a representational structure, which is regularly textualized in the discourse of mass media. It is proved that discourse-world of information war presents a macrostructure that is created by journalists and interpreted by readers under the influence of situation that determines its conceptual content. The paper analyses the discourse-world of information war in the American press. Key concepts constituting the macrostructure of the discourse-world are systematized. The notion of the world-modelling potential of the concept is put forward. World-modelling potential of the concept DISINFORMATION is characterized according to the parameters of semiotic density, syntagmatic relations, figurative and evaluative representations, factual information. The results may prove fruitful for further development of the theory of the language of information war
Keywords: Linguistics of information war, information war, cognitive-discursive approach, world-modelling, discourse-world, media communication.