Dimension/daɪˈmenʃn/ Definition 1 of 4Pro Tip 1/3Physical Objects Use 'dimension' to talk about the measurable attributes of physical objects. What are the dimensions of your new refrigerator? Pro Tip 2/3Unit Specific Always specify units when discussing the dimensions of an object. The dimensions of the table are 120 cm by 80 cm. Pro Tip 3/3Shape Indication Dimensions can help visualize the shape of objects not seen firsthand. A cube has three equal dimensions.