layer in WordNet English dictionary

1. single thickness of usually some homogeneous substance
   "slices of hard-boiled egg on a bed of spinach"
   layer  bed 
   
2. thin structure composed of a single thickness of cells
   layer 
   
3. a hen that lays eggs
   layer 
   
4. an abstract place usually conceived as having depth
   "a good actor communicates on several levels"; "a simile has at least two layers of meaning"; "the mind functions on many strata simultaneously"
   level  layer  stratum 
   
5. a relatively thin sheetlike expanse or region lying over or under another
   layer 
   

1. make or form a layer
   "layer the different colored sands"
   layer