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Definition: layer


(1) A blockchain level. See chain and blockchain.

(2) One of seven levels of processing in a network protocol. See OSI model.

(3) A tier. Layers tend to refer to software that comprise a hierarchy of code, each layer communicating with the one above or below it.

(4) One of several "drawing boards" or "canvasses" for creating elements in a picture. See layers and flatten layers.