In SAP Analytics Cloud, dimensions usually represent qualitative master data. Product, cost center, and employee are all examples of dimensions. A model can, and typically does, have several dimensions.
A measure represents transactional or quantitative data; for example, price, revenue, number of customers. In a classic account model, all the numeric values are stored in a single default dimension referred to as a Measure, and you use the account structure to determine what each value represents. You can also add calculations, specify units, and set aggregation types for those values. Semantically, an Account dimension type may be referred to as a measure because it fulfills a similar purpose; however, it is really a dimension.
In the new model type, however, measures are distinct from dimensions, so you can add and configure multiple measures with aggregation and units to fit your data.