Systems and methods for multi-dimensional aggregation. Exemplary embodiments include a method for retrieving data from an inverted list index within a computer system, wherein the index comprises annotated postings, the method including receiving a query in a system, converting the query into a query language, scanning at least one list of postings for data from the query, aggregating the data in the list, thereby resulting in an aggregated list, wherein the aggregating includes recording the occurrence of unique values from the list, mapping the values using a user-provided definition to an alternate value, grouping the values by a user-provided mapping of values to groups, recording and mutating data associated with the unique value in the list, relating the recorded data values with other values in the index and returning the requested data from the aggregated list in a return format.