layeringPronunciation: /ˈleɪərɪŋ/Definition of layering noun [mass noun] 1the action of arranging something in layers. Geology the presence or formation of layers in sedimentary or igneous rock. 2a method of propagating a plant in which a shoot is fastened down to form roots while still attached to the parent plant. layering in other Oxford dictionaries Definition of layering in the US English dictionary