1.Definition: a hen that lays eggs

Category: Animals

2.Definition: a relatively thin sheetlike expanse or region lying over or under another

Category: Places

3.Definition: 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"

Related Noun(s):level, stratum

Category: General

4.Definition: single thickness of usually some homogeneous substance

Related Noun(s):bed

Category: Objects

5.Definition: thin structure composed of a single thickness of cells

Category: Animals