(ˈleɪ ər) n. one. a thickness of some materials laid on or spread around a floor: a layer of soot on the window sill; two layers of paint. two. mattress; stratum: alternating layers of basalt and sandstone. 3. a person or point that lays: a carpet layer. 4. a hen stored for egg creation. five. considered one of quite a few things of clothes worn