Many studies in cognitive linguistics have analysed the semantics of 'over', notably the semantics associated with 'over' as a preposition. Most of them generally conclude that 'over' is polysemic and this polysemy is to be described thanks to a semantic radial network, showing the relationships between the different meanings of the word. What we would like to suggest on the contrary is that the meanings of 'over' are highly dependent on the utterance context in which its occurrences are embedded, and consequently that the meaning of 'over' itself is under-specified, rather than polysemic. Moreover, to provide a more accurate account of the apparent wide range of meanings of 'over' in context, we ought to take into account the other uses of this unit: as an adverb and particle, and not only as a preposition. In this paper, we provide a corpus-based description of 'over' which leads us to propose a monosemic definition. ,So as to achiev such a description, we used a short dataset of randomly selected 326 sentences containing 'over' in various positions in the sentences and corresponding to various categories.