A sheet is a large, wide amount of something flat, like a sheet of metal or a sheet of paper. When it goes on your bed, a sheet is a similar expanse of fabric.

The sheets on your bed cover your mattress and lie beneath your blanket or comforter, and the huge windows in your imaginary dream house would require enormous sheets of glass. Sheet music consists of musical notation written on sheets of paper, and a sheet of rain comes down so hard it looks like a solid surface. If it rained overnight and the water froze on the ground, you might say, "Careful, it's a sheet of ice outside!"

Definitions of sheet
  1. noun
    any broad thin expanse or surface
    “a sheet of ice”
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    type of:
    a wide and open space or area as of surface or land or sky
  2. noun
    a flat artifact that is thin relative to its length and width
    synonyms: flat solid
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    blackboard, chalkboard
    sheet of slate; for writing with chalk
    a piece of material ready to be made into something
    a flat piece of material designed for a special purpose
    film, plastic film
    a thin sheet of (usually plastic and usually transparent) material used to wrap or cover things
    a sheet of material made by bonding two or more sheets or layers
    a thin pliable sheet of material
    sheet that forms a distinct (usually flat and rectangular) section or component of something
    a sheet of metal or wood or glass or plastic
    photographic plate, plate
    a flat sheet of metal or glass on which a photographic image can be recorded
    plate glass, sheet glass
    glass formed into large thin sheets
    sheet metal
    sheet of metal formed into a thin plate
    a sheet of material (metal, plastic, cardboard, waxed paper, silk, etc.) that has been perforated with a pattern (printing or a design); ink or paint can pass through the perforations to create the printed pattern on the surface below
    a board that is pulled by a speedboat as a person stands on it and skims over the top of the water
    baffle, baffle board
    a flat plate that controls or directs the flow of fluid or energy
    bread board, breadboard
    a wooden or plastic board on which dough is kneaded or bread is sliced
    bulletin board, notice board
    a board that hangs on a wall; displays announcements
    chopping board, cutting board
    a wooden board where meats or vegetables can be cut
    caisson, coffer, lacuna
    an ornamental sunken panel in a ceiling or dome
    corrugated iron
    usually galvanized sheet iron or sheet steel shaped into straight parallel ridges and hollows
    cover glass, cover slip
    a small and very thin piece of glass used to cover the specimen on a microscope slide
    cylinder head
    a detachable plate that covers the closed end of a cylinder chamber in a reciprocating engine or pump
    a movable iron plate that regulates the draft in a stove or chimney or furnace
    disc, disk
    a flat circular plate
    drafting board, drawing board
    a smooth board on which paper is placed for making drawings
    drainboard, draining board
    a board beside a kitchen sink and inclined to drain into the sink
    drumhead, head
    a membrane that is stretched taut over a drum
    a block or plate or other hard surface that has been engraved
    (nautical) a plate on a ship's stern on which the name is inscribed
    fin keel
    a metal plate projecting from the keel of a shallow vessel to give it greater lateral stability
    metal plate bolted along sides of two rails or beams
    sheet metal shaped and attached to a roof for strength and weatherproofing
    floor board, floorboard
    a board in the floor
    a piece of thin and flexible sheet metal
    a vertical board or panel forming the foot of a bedstead
    gel, gelatin
    a thin translucent membrane used over stage lights for color effects
    grid, storage-battery grid
    a perforated or corrugated metal plate used in a storage battery as a conductor and support for the active material
    gusset, gusset plate
    a metal plate used to strengthen a joist
    a vertical board or panel forming the head of a bedstead
    ironing board
    narrow padded board on collapsible supports; used for ironing clothes
    a board (sometimes cushioned) for someone to kneel on
    thin plate
    license plate, numberplate
    a plate mounted on the front and back of car and bearing the car's registration number
    a square plate bearing the letter L that is attached to both ends of a car to indicate that the driver is a learner
    hawk, mortarboard
    a square board with a handle underneath; used by masons to hold or carry mortar
    a plate bearing a name
    palette, pallet
    board that provides a flat surface on which artists mix paints and the range of colors used
    pane, pane of glass, window glass
    sheet glass cut in shapes for windows or doors
    pane, paneling, panelling
    a panel or section of panels in a wall or door
    a triangular board supported on casters; when lightly touched with the fingertips it is supposed to spell out supernatural (or unconscious) messages
    plastic laminate
    a laminate made by bonding plastic layers
    plate iron
    a plate of iron
    the flat plate of a printing press that presses the paper against the type
    plessimeter, pleximeter
    a small thin metal plate held against the body and struck with a plexor in percussive examinations
    plyboard, plywood
    a laminate made of thin layers of wood
    (trade mark) a plastic film that can polarize a beam of light; often used in sunglasses to eliminate glare
    quarter plate
    a photographic plate measuring 3.25 inches by 4.25 inches
    a large board for displaying the score of a contest (and some other information)
    the clinging transparent plastic film that is used to shrinkwrap something
    a board that forms part of the side of a bed or crib
    a removable board fitted on the side of a wagon to increase its capacity
    a board with wheels that is ridden in a standing or crouching position and propelled by foot
    microscope slide, slide
    a small flat rectangular piece of glass on which specimens can be mounted for microscopic study
    a board that resembles a broad ski or a small surfboard; used in a standing position to slide down snow-covered slopes
    a flexible board for jumping upward
    a narrow buoyant board for riding surf
    a small metal plate that attaches to the toe or heel of a shoe (as in tap dancing)
    tin plate, tinplate
    a thin sheet of metal (iron or steel) coated with tin to prevent rusting; used especially for cans, pots, and tins
    a wooden board or platter on which food is served or carved
    wainscot, wainscoting, wainscotting
    wooden panels that can be used to line the walls of a room
    dado, wainscot
    panel forming the lower part of an interior wall when it is finished differently from the rest of the wall
    wake board, wakeboard
    a buoyant board (resembling a surfboard) that is used to ride over water while being pulled behind a motorboat
    dry wall, drywall, wallboard
    a wide flat board used to cover walls or partitions; made from plaster or wood pulp or other materials and used primarily to form the interior walls of houses
    a transparent panel (as of an envelope) inserted in an otherwise opaque material
    work-board, workboard
    a horizontal board that provides a supported surface for manual work
    type of:
    artefact, artifact
    a man-made object taken as a whole
  3. verb
    come down as if in sheets
    “The rain was sheeting down during the monsoon”
  4. noun
    bed linen consisting of a large rectangular piece of cotton or linen cloth; used in pairs
    synonyms: bed sheet
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    contour sheet, fitted sheet
    a sheet (usually with elastic edges) tailored to fit a particular mattress
    type of:
    bed linen
    linen or cotton articles for a bed (as sheets and pillowcases)
  5. noun
    a large piece of fabric (usually canvas fabric) by means of which wind is used to propel a sailing vessel
    synonyms: canvas, canvass, sail
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    balloon sail
    any light loose sail
    crossjack, mizzen course
    the lowermost sail on a mizzenmast
    fore-and-aft sail
    any sail not set on a yard and whose normal position is in a fore-and-aft direction
    the lowest sail on the foremast of a square-rigged vessel
    any sail set forward of the foremast of a vessel
    the lowermost sail on the mainmast
    a topsail set on the mainmast
    press of canvas, press of sail
    the greatest amount of sail that a ship can carry safely
    a sail set next above the topgallant on a royal mast
    a sail set to catch wind spilled from a larger sail
    the sail above the royal on a square-rigger
    square sail
    a four-sided sail set beneath a horizontal yard suspended at the middle from a mast
    topgallant, topgallant sail
    a sail set on a yard of a topgallant mast
    a sail (or either of a pair of sails) immediately above the lowermost sail of a mast and supported by a topmast
    the topsail on a foremast
    gaff-headed sail, gaffsail
    a quadrilateral fore-and-aft sail suspended from a gaff
    fore-and-aft topsail, gaff topsail
    a triangular fore-and-aft sail with its foot along the gaff and its luff on the topmast
    any triangular fore-and-aft sail (set forward of the foremast)
    lateen, lateen sail
    a triangular fore-and-aft sail used especially in the Mediterranean
    lug, lugsail
    a sail with four corners that is hoisted from a yard that is oblique to the mast
    main course
    a square mainsail
    mizen, mizzen
    fore-and-aft sail set on the mizzenmast
    a fore-and-aft sail set on the aftermost lower mast (usually the mizzenmast) of a vessel
    a large and usually triangular headsail; carried by a yacht as a headsail when running before the wind
    a fore-and-aft sail extended by a sprit
    a fore-and-aft sail set on a stay (as between two masts)
    type of:
    piece of cloth, piece of material
    a separate part consisting of fabric
  6. verb
    cover with a sheet, as if by wrapping
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    type of:
    provide with a covering or cause to be covered
  7. noun
    (nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind
    synonyms: mainsheet, shroud, tack, weather sheet
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    futtock shroud
    shroud that is part of a ship's rigging
    type of:
    something (as a cord or rope) that is long and thin and flexible
  8. noun
    paper used for writing or printing
    synonyms: piece of paper, sheet of paper
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    slip, slip of paper
    a small sheet of paper
    a sheet with several pages printed on it; it folds to page size and is bound with other signatures to form a book
    folio, leaf
    a sheet of any written or printed material (especially in a manuscript or book)
    tear sheet
    a sheet that can be easily torn out of a publication
    a size of paper used especially in Britain
    style sheet
    a sheet summarizing the editorial conventions to be followed in preparing text for publication
    a sheet of paper with multiple columns; used by an accountant to assemble figures for financial statements
    revenue stamp, stamp
    a small piece of adhesive paper that is put on an object to show that a government tax has been paid
    a blank leaf in the front or back of a book
    a blank leaf inserted between the leaves of a book
    one side of one leaf (of a book or magazine or newspaper or letter etc.) or the written or pictorial matter it contains
    type of:
    a material made of cellulose pulp derived mainly from wood or rags or certain grasses
  9. noun
    newspaper with half-size pages
    synonyms: rag, tabloid
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    type of:
    newspaper, paper
    a daily or weekly publication on folded sheets; contains news and articles and advertisements
  10. noun
    (mathematics) an unbounded two-dimensional shape
    synonyms: plane
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    Cartesian plane
    a plane in which all points can be described in Cartesian coordinates
    facet plane
    the plane of a facet of an object (as of a cube)
    midline, midplane
    the median plane of the body (or some part of the body)
    orbital plane
    (astronomy) the plane on which a body is orbiting
    picture plane
    the plane that is in the foreground of a drawing or painting; coextensive with but different from the objective surface of the work
    tangent plane
    the plane that contains all the lines tangent to a specific point on a surface
    type of:
    form, shape
    the spatial arrangement of something as distinct from its substance
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