[Home](./index.md) > [kibana-plugin-plugins-expressions-server](./kibana-plugin-plugins-expressions-server.md) > [ExpressionFunctionDefinitions](./kibana-plugin-plugins-expressions-server.expressionfunctiondefinitions.md) > [cumulative\_sum](./kibana-plugin-plugins-expressions-server.expressionfunctiondefinitions.cumulative_sum.md) ## ExpressionFunctionDefinitions.cumulative\_sum property Signature: ```typescript cumulative_sum: ExpressionFunctionCumulativeSum; ```