(1) An event, such as a change in the value of an expression, that may occur while SQL*Plus processes a query or report. You can direct SQL*Plus to perform various operations, such as printing subtotals, whenever specified breaks occur. (2) An Oracle Data Browser option from the Fields menu, which allows you to suppress duplicate field values in the Results Window, and sort the data in your query by values for the specified break field(s). You can also direct Oracle Data Browser to perform various summary operations, such as calculating an average, whenever specified breaks occur. See also break field.