Update functions-timeout-duration.md

Author: satvu

includes/functions-timeout-duration.md

@@ -7,7 +7,7 @@ ms.author: glenga
 ---
 ## <a name="timeout"></a>Function app timeout duration 
 
-The timeout duration of a function app is defined by the `functionTimeout` property in the [host.json](../articles/azure-functions/functions-host-json.md#functiontimeout) project file. The following table shows the default and maximum values (in minutes) for specific plans:
+The timeout duration of a function app is defined by the `functionTimeout` property in the [host.json](../articles/azure-functions/functions-host-json.md#functiontimeout) project file. This property specifically applies to function executions (i.e. after the start of a function execution, the function needs to return/respond within the timeout duration). The following table shows the default and maximum values (in minutes) for specific plans:
 
 | Plan | Default | Maximum<sup>1</sup> |
 |------|---------|---------|---------|