In everyday use, liquid is the opposite of solid––water at room temperature is a liquid: Heat it to boiling, it turns to a gas. Chill it below freezing, it turns to ice.

Liquid describes a state in which a compound such as water flows. Juice is a liquid. Milk is a liquid. Your swimming pool is full of liquid. When assets are liquid, that means they can be liquidated easily, i.e., sold for cash. Stocks and bonds are liquid assets. Real estate, which can take a long time to sell, is considered illiquid.

Definitions of liquid
  1. noun
    fluid matter having no fixed shape but a fixed volume
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    artificial blood
    a liquid that can carry large amounts of oxygen and can serve as a temporary substitute for blood
    a sweet flavored liquid (usually containing a small amount of alcohol) used in compounding medicines to be taken by mouth in order to mask an unpleasant taste
    H2O, water
    binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent
    an extravasated liquid (blood or lymph or urine); the product of extravasation
    a liquid that is instilled drop by drop
    liquid crystal
    a liquid exhibiting properties of a crystal that are not shown by ordinary liquids
    liquid that is spilled
    a sterile liquid containing a purified protein derivative of the tuberculosis bacterium; used in the diagnosis of tuberculosis
    tap water
    water directly from the spigot
    bath water
    water used for a bath
    water in which dishes and cooking utensils are washed
    distilled water
    water that has been purified by distillation
    holy water
    water that has been blessed by a priest for use in symbolic purification
    ground water, spring water, well water
    underground water that is held in the soil and in pervious rocks
    hard water
    water that contains mineral salts (as calcium and magnesium ions) that limit the formation of lather with soap
    solution of calcium hydroxide in water used as an antacid
    melted snow or ice
    brine, saltwater, seawater
    water containing salts
    fresh water, freshwater
    water that is not salty
    partially melted snow
    soft water
    water that is not hard (does not contain mineral salts that interfere with the formation of lather with soap)
    bilge, bilge water
    water accumulated in the bilge of a ship
    water of crystallisation, water of crystallization, water of hydration
    the water present in hydrated compounds
    type of:
    continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas
  2. noun
    a substance that is liquid at room temperature and pressure
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    beverage, drink, drinkable, potable
    any liquid suitable for drinking
    a liquid necessary for the life of most animals and plants
    the clear liquid that lies above a sediment or precipitate
    any of a series of volatile hydroxyl compounds that are made from hydrocarbons by distillation
    ammonia, ammonia water, ammonium hydroxide
    a water solution of ammonia
    a liquid added to the water in a cooling system to lower its freezing point
    distillate, distillation
    a purified liquid produced by condensation from a vapor during distilling; the product of distilling
    pyroligneous acid, wood vinegar
    a red-brown liquid formed in distillation of wood which contains acetic acid, methanol, acetone, wood oils, and tars
    a liquid with which pigment is mixed by a painter
    a liquid used for printing or writing or drawing
    a thick viscous liquid
    a liquid substance that is a solution (or emulsion or suspension) used or obtained in an industrial process
    sheep dip
    a liquid mixture containing pesticides in which sheep are dipped to kill parasites
    snake oil
    (medicine) any of various liquids sold as medicine (as by a travelling medicine show) but medically worthless
    a white nutritious liquid secreted by mammals and used as food by human beings
    any thin watery drink
    a medicinal or magical or poisonous beverage
    alcohol, alcoholic beverage, alcoholic drink, inebriant, intoxicant
    a liquor or brew containing alcohol as the active agent
    honey diluted in water; becomes mead when fermented
    wine mixed with honey
    near beer
    drink that resembles beer but with less than 1/2 percent alcohol
    ginger beer
    carbonated slightly alcoholic drink flavored with fermented ginger
    club soda or fruit juice used to mix with alcohol
    an iced drink especially white wine and fruit juice
    a drink that refreshes
    a thick smooth drink consisting of fresh fruit pureed with ice cream or yoghurt or milk
    an effervescent beverage (usually alcoholic)
    cider, cyder
    a beverage made from juice pressed from apples
    chocolate, cocoa, drinking chocolate, hot chocolate
    a beverage made from cocoa powder and milk and sugar; usually drunk hot
    fruit crush, fruit juice
    drink produced by squeezing or crushing fruit
    ade, fruit drink
    a sweetened beverage of diluted fruit juice
    South American tea-like drink made from leaves of a South American holly called mate
    soft drink
    nonalcoholic beverage (usually carbonated)
    coffee, java
    a beverage consisting of an infusion of ground coffee beans
    a beverage made by steeping tea leaves in water
    tea-like drink
    a beverage that resembles tea but is not made from tea leaves
    branch water
    pure natural water from a stream or brook; often distinguished from soda water
    spring water
    water from a spring
    drinking water
    water suitable for drinking
    methanol, methyl alcohol, wood alcohol, wood spirit
    a light volatile flammable poisonous liquid alcohol; used as an antifreeze and solvent and fuel and as a denaturant for ethyl alcohol
    ethanol, ethyl alcohol, fermentation alcohol, grain alcohol
    the intoxicating agent in fermented and distilled liquors; used pure or denatured as a solvent or in medicines and colognes and cleaning solutions and rocket fuel; proposed as a renewable clean-burning additive to gasoline
    isopropanol, isopropyl alcohol
    alcohol used as antifreeze or a solvent
    allyl alcohol, propenyl alcohol
    an unsaturated primary alcohol present in wood spirit; use to make resins and plasticizers and pharmaceuticals
    amyl alcohol
    a mixture of 2 or more isomeric alcohols; used as a solvent and in organic synthesis
    butanol, butyl alcohol
    a flammable alcohol derived from butanes and used for solvents
    a colorless oily alcohol that smells like camphor
    dihydric alcohol, diol, glycol
    any of a class of alcohols having 2 hydroxyl groups in each molecule
    ethanediol, ethylene glycol, glycol
    a sweet but poisonous syrupy liquid used as an antifreeze and solvent
    propanediol, propylene glycol
    a sweet colorless, viscous, hygroscopic liquid used as an antifreeze and in brake fluid and also as a humectant in cosmetics and personal care items although it can be absorbed through the skin with harmful effects
    glycerin, glycerine, glycerol
    a sweet syrupy trihydroxy alcohol obtained by saponification of fats and oils
    indelible ink
    ink that cannot be erased or washed away
    India ink, drawing ink
    a black liquid ink used for printing or writing or drawing
    magnetic ink
    an ink that contains particles of a magnetic substance whose presence can be detected by magnetic sensors
    printer's ink, printing ink
    a semisolid quick drying ink made especially for use in printing
    writing ink
    any permanent or washable ink used with pens
    1-dodecanol, lauryl alcohol
    a colorless insoluble solid alcohol used to make detergents and pharmaceuticals
    magilp, megilp
    a medium for oil-paints; linseed oil mixed with mastic varnish or turpentine
    propanol, propyl alcohol
    a clear colorless volatile liquid (alcohol) used as a solvent and antiseptic
    steroid alcohol, sterol
    any of a group of natural steroid alcohols derived from plants or animals; they are waxy insoluble substances
    type of:
    a substance that is fluid at room temperature and pressure
  3. noun
    the state in which a substance exhibits a characteristic readiness to flow with little or no tendency to disperse and relatively high incompressibility
    synonyms: liquid state, liquidity, liquidness
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    type of:
    state, state of matter
    (chemistry) the three traditional states of matter are solids (fixed shape and volume) and liquids (fixed volume and shaped by the container) and gases (filling the container)
  4. adjective
    existing as or having characteristics of a liquid; especially tending to flow
    “water and milk and blood are liquid substances”
    fluid, runny
    characteristic of a fluid; capable of flowing and easily changing shape
    liquefiable, liquifiable
    capable of being liquefied
    liquefied, liquified
    reduced to a liquid state
    somewhat liquid
    relating to or resembling or consisting of water
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    of definite shape and volume; firm; neither liquid nor gaseous
    existing as or having characteristics of a gas
    resisting weight or pressure
    coagulated, solidified
    changed into a solid mass
    formed by the coalescence of particles
    congealed, jelled, jellied
    congealed into jelly; solidified by cooling
    used of solid substances in contrast with liquid ones
    partly solid; having a rigidity and viscosity intermediate between a solid and a liquid
    consisting of semiconductor materials and components and related devices
    characteristic of or relating to the physical properties of solid materials especially electromagnetic or thermodynamic or structural properties of crystalline solids
    aeriform, airlike
    resembling air or having the form of air
    aerosolised, aerosolized
    in the form of ultramicroscopic solid or liquid particles dispersed or suspended in air or gas
    drawn off in the form of vapor
    gasified, vaporized, vapourised, volatilised, volatilized
    converted into a gas or vapor
    resembling gas
    vaporific, vaporish, vaporous, vapourific, vapourish, vapourous
    resembling or characteristic of vapor
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  5. adjective
    changed from a solid to a liquid state
    synonyms: liquified, melted
    not frozen
    (of solid matter) reduced to a liquid form
    capable of being melted and fused
    liquefied, liquified, molten
    reduced to liquid form by heating
    no longer frozen solid
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    not melted
    turned into ice; affected by freezing or by long and severe cold
    not thawed
    retaining a solid form
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  6. adjective
    filled or brimming with tears
    “sorrow made the eyes of many grow liquid
    synonyms: swimming
    filled with or marked by tears
  7. adjective
    clear and bright
    “the liquid air of a spring morning”
    “eyes shining with a liquid luster”
    synonyms: limpid
    allowing light to pass through
  8. adjective
    smooth and flowing in quality; entirely free of harshness
    “the liquid song of a robin”
    characteristic of or resembling or accompanied by music
  9. adjective
    smooth and unconstrained in movement
    “the liquid grace of a ballerina”
    synonyms: fluent, fluid, smooth
    characterized by beauty of movement, style, form, or execution
  10. noun
    a frictionless continuant that is not a nasal consonant (especially `l' and `r')
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    type of:
    a speech sound that is not a vowel
  11. adjective
    in cash or easily convertible to cash
    synonyms: fluid
    free or available for use or disposition
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