What is the meaning of Layer?

A single thickness of some material covering a surface.

An item of clothing worn under or over another.

A (usually) horizontal deposit; a stratum.

One of the items in a hierarchy.

one in a stack of (initially transparent) drawing surfaces that comprise an image; used to keep elements of an image separate so that they can be modified independently from one another.

One of the seven network switch pieces in the Open Systems Interconnection model: application, presentation, session, transport, network, data link, and physical.

To cut or divide into layers.

To arrange in layers.

A person who lays anything, such as tiles or a wager.

A mature female bird, insect, etc. that is able to lay eggs.

A hen kept to lay eggs.

A shoot of a plant, laid underground for growth.

Source: wiktionary.org