The present paper discusses the natural polysemy of lexemes, perceived as important problem of automatic translation. We aim at presenting the results of the disambiguation process of the Spanish verb of movement subir, which is characterized by its ambiguity. The framework of this paper constitutes the lexicographical description proposed by Wiesław Banyś — the object-oriented approach (2002a, 2002b). The analysis is based on the information taken from Spanish dictionaries (Clave — diccionario del español actual, Diccionario de la Lengua Española — Real Academia Española, Gran Diccionario de uso del Español Actual, Diccionario de uso del Español — María Moliner) and it is completed by the corpus found by search engines. Every meaning of the verb (which is equivalent to its translation into Polish) is illustrated with some examples and accompanied by syntactic-semantic schemes. After analysing the contexts in which the verb has appeared and specifying the object classes for each use of the verb we give its Polish equivalents and present the results of the research in form of tables.