say it: LAY-ur
layer is a noun and verb meaning "single thickness of usually some homogeneous substance". It carries 6 recorded senses.
a relatively thin sheetlike expanse or region lying over or under another
a hen that lays eggs
thin structure composed of a single thickness of cells
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for layer come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.