Layer

Layer may refer to:

 A layer of archaeological deposits in an excavation
 A layer hen, a hen kept to produce eggs
 Layered clothing, wearing multiple layers of clothing

Fiction
 Layer, a female Maverick Hunter in the Mega Man X series

Science
 Stratum, a layer of rock or soil with similar composition
 Thermocline, a layer of temperature within an area of water

Technology
Computing
 Abstraction layer, a way of hiding the specifications of a function
 OSI model layers
 Internet protocol suite layers
 2D computer graphics#Layers, layers in two-dimensional (2D) computer graphics
 Layers (digital image editing), used in digital image editing to separate different elements of an image

Electronics
 DVD layer, such as in DVD dual layer recording
 Layer (electronics), a single thickness of some material covering a surface