What Does Layer Mean?

A layer, in the context of object-oriented design, is a set of classes that share the same module dependencies with other modules, implying that layer components are reusable as long as conditions stay the same.


These "import" dependencies between software modules is a way to express layer distinction in programming languages.

Techopedia Explains Layer

Layers act as a sort of architectural pattern. Tree-form hierarchy is one of the common arrangements of layers, where limbs/links between layers are known as dependency relationships.

Multiple forms of dependency relationships between layers include inheritance, composition and aggregation. There are other forms of dependencies in other architectures.


Related Terms

Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.