layer

The noun layer describes a thin piece that's stacked on other thin pieces, like a layer of noodles in a lasagna dish. You can also apply a layer of paint to make your wall color more vivid.

Layer can also be used figuratively to describe an abstract thickness or barrier. Celebrities are known to surround themselves with managers, agents, stylists, and friends — forming a layer between them and the prying public. Layer can also be a verb. You can layer your bed with blankets on a cold night, as a layer of ice forms on the sidewalks and streets outside.

Definitions of layer
  1. noun
    single thickness of usually some homogeneous substance
    synonyms: bed
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    types:
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    backing, mount
    something forming a back that is added for strengthening
    blanket
    a layer of lead surrounding the highly reactive core of a nuclear reactor
    course, row
    (construction) a layer of masonry
    cushion
    the layer of air that supports a hovercraft or similar vehicle
    interlayer
    a layer placed between other layers
    lift
    one of the layers forming the heel of a shoe or boot
    overlay
    a layer of decorative material (such as gold leaf or wood veneer) applied over a surface
    ply
    (usually in combinations) one of several layers of cloth or paper or wood as in plywood
    tier
    one of two or more layers one atop another
    wall
    a layer of material that encloses space
    damp course, damp-proof course
    a course of some impermeable material laid in the foundation walls of building near the ground to prevent dampness from rising into the building
    row of bricks
    a course of bricks place next to each other (usually in a straight line)
    top lift
    the bottom layer of a heel
    type of:
    artefact, artifact
    a man-made object taken as a whole
  2. noun
    a relatively thin sheetlike expanse or region lying over or under another
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    examples:
    A horizon
    the top layer of a soil profile; usually contains humus
    B horizon
    immediately below the A-horizon; contains deposits of organic matter leached from surface soils
    C horizon
    beneath the B-horizon and above the bedrock; consisting of weathered rock
    types:
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    stratum
    one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)
    asthenosphere
    the lower layer of the crust
    chromosphere
    a gaseous layer of the sun's atmosphere (extending from the photosphere to the corona) that is visible during a total eclipse of the sun
    Earth's crust, crust
    the outer layer of the Earth
    exosphere
    the outermost atmospheric layer
    hydrosphere
    the watery layer of the earth's surface; includes water vapor
    geosphere, lithosphere
    the solid part of the earth consisting of the crust and outer mantle
    lower mantle
    the deeper part of the mantle
    mantle
    the layer of the earth between the crust and the core
    mesosphere
    the atmospheric layer between the stratosphere and the thermosphere
    ozone layer, ozonosphere
    a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
    stratosphere
    the atmospheric layer between the troposphere and the mesosphere
    Earth's surface, surface
    the outermost level of the land or sea
    thermosphere
    the atmospheric layer between the mesosphere and the exosphere
    tropopause
    the region of discontinuity between the troposphere and the stratosphere
    troposphere
    the lowest atmospheric layer; from 4 to 11 miles high (depending on latitude)
    upper mantle
    the upper part of the mantle
    cell wall
    a rigid layer of polysaccharides enclosing the membrane of plant and prokaryotic cells; maintains the shape of the cell and serves as a protective barrier
    snow
    a layer of snowflakes (white crystals of frozen water) covering the ground
    cuticle, epidermis
    the outer layer of the skin covering the exterior body surface of vertebrates
    corneum, horny layer, stratum corneum
    the outermost layer of the epidermis consisting of dead cells that slough off
    stratum lucidum
    the layer of epidermis immediately under the stratum corneum in the skin of the palms and soles
    stratum granulosum
    the layer of epidermis just under the stratum corneum or (on the palms and soles) just under the stratum lucidum; contains cells (with visible granules) that die and move to the surface
    malpighian layer, rete Malpighii, stratum basale, stratum germinativum
    the innermost layer of the epidermis
    corium, derma, dermis
    the deep vascular inner layer of the skin
    cambium
    the inner layer of the periosteum
    paries, wall
    (anatomy) a layer (a lining or membrane) that encloses a structure
    substrate, substratum
    any stratum or layer lying underneath another
    superstrate, superstratum
    any stratum or layer superimposed on another
    horizon
    a specific layer or stratum of soil or subsoil in a vertical cross section of land
    bed, seam
    a stratum of ore or coal thick enough to be mined with profit
    bed
    (geology) a stratum of rock (especially sedimentary rock)
    floor
    the bottom surface of any lake or other body of water
    floor
    the lower inside surface of any hollow structure
    horst
    a ridge of the earth's crust that has been forced upward between two faults and so is higher than the surrounding land
    crustal plate, plate
    a rigid layer of the Earth's crust that is believed to drift slowly
    corn snow
    granular snow formed by alternate thawing and freezing
    crud
    heavy wet snow that is unsuitable for skiing
    type of:
    part, region
    the extended spatial location of something
  3. noun
    thin structure composed of a single thickness of cells
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    types:
    blastoderm, blastodisc, germinal area, germinal disc
    a layer of cells on the inside of the blastula
    hypodermis
    layer of cells that secretes the chitinous cuticle in e.g. arthropods
    type of:
    anatomical structure, bodily structure, body structure, complex body part, structure
    a particular complex anatomical part of a living thing
  4. noun
    an abstract place usually conceived as having depth
    “a simile has at least two layers of meaning”
    synonyms: level, stratum
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    type of:
    place
    an abstract mental location
  5. verb
    make or form a layer
    layer the different colored sands”
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    type of:
    forge, form, mold, mould, shape, work
    make something, usually for a specific function
  6. noun
    a hen that lays eggs
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    type of:
    biddy, hen
    adult female chicken
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