From Longman Dictionary of Contemporary Englishdimensionsdimensions[plural] how great or serious a problem is a catastrophe of enormous dimensions → dimension
Examples from the Corpus
dimensions• When decorating your house, you should consider the dimensions of each room.From Longman Business Dictionarydimensionsdi‧men‧sions /daɪˈmenʃənz, də-/ noun [plural] the size of something, especially when this is given as its length, height, and widthWe need to know the exact dimensions of the room.a small aluminium case, dimensions 152mm by 102mm by 51mm. 