What is an aspect in spring?

In Spring, an aspect is a class that performs enterprise application interests that cut across various classes, such as transaction management and its role looks and smells like it should have structure, but you can't find a way to represent this structure in code with conventional object-oriented techniques. Aspects can be a regular class configured through Spring XML configuration or we can use Spring AspectJ integration to define a class as Aspect employing @Aspect annotation.