A single thickness of a material covering a surface or forming an overlying part or segment: a layer of dust on the windowsill; a cake with four layers.
A usually horizontal deposit or expanse; a stratum: layers of sedimentary rock; a layer of warm air.
A depth or level: a poem with several layers of meaning.
Botany A stem that is covered with soil for rooting while still part of the living plant.
An item of clothing worn over or under another.
To divide or form into layers: layered gravel and charcoal to make a filter.
To cut (hair) into different, usually overlapping lengths.
Botany To propagate (a plant) by means of a layer.