Source : Webster's Revised Unabridged Dictionary (1913)

Liquid \Liq"uid\ (l[i^]k"w[i^]d), a. [L. liquidus, fr. liquere
   to be fluid or liquid; cf. Skr. r[=i] to ooze, drop, l[=i] to
   melt.]
   1. Flowing freely like water; fluid; not solid.

            Yea, though he go upon the plane and liquid water
            which will receive no step.           --Tyndale.

   2. (Physics) Being in such a state that the component parts
      move freely among themselves, but do not tend to separate
      from each other as the particles of gases and vapors do;
      neither solid nor a["e]riform; as, liquid mercury, in
      distinction from mercury solidified or in a state of
      vapor.

   3. Flowing or sounding smoothly or without abrupt transitions
      or harsh tones. ``Liquid melody.'' --Crashaw.

   4. Pronounced without any jar or harshness; smooth; as, l and
      r are liquid letters.

   5. Fluid and transparent; as, the liquid air.

   6. Clear; definite in terms or amount.[Obs.] ``Though the
      debt should be entirely liquid.'' --Ayliffe.

Liquid \Liq"uid\, n.
   1. A substance whose parts change their relative position on
      the slightest pressure, and therefore retain no definite
      form; any substance in the state of liquidity; a fluid
      that is not a["e]riform.

Source : WordNet®

liquid
     adj 1: existing as or having characteristics of a liquid;
            especially tending to flow; "water and milk and blood
            are liquid substances" [ant: {gaseous}, {solid}]
     2: filled or brimming with tears; "swimming eyes"; "watery
        eyes"; "sorrow made the eyes of many grow liquid" [syn: {swimming},
         {watery}]
     3: clear and bright; "the liquid air of a spring morning";
        "eyes shining with a liquid luster"; "limpid blue eyes"
        [syn: {limpid}]
     4: changed from a solid to a liquid state; "rivers filled to
        overflowing by melted snow" [syn: {melted}, {liquified}]
        [ant: {unmelted}]
     5: smooth and flowing in quality; entirely free of harshness;
        "the liquid song of a robin"
     6: yielding; lacking any hint of hardness; "the liquid
        stillness of the night enveloping him"; "the liquid brown
        eyes of a spaniel"
     7: smooth and unconstrained in movement; "a long, smooth
        stride"; "the fluid motion of a cat"; "the liquid grace of
        a ballerina"; "liquid prose" [syn: {flowing}, {fluent}, {fluid},
         {smooth}]
     8: in cash or easily convertible to cash; "liquid (or fluid)
        assets" [syn: {fluid}]

liquid
     n 1: a substance that is liquid at room temperature and pressure
     2: the state in which a substance exhibits a characteristic
        readiness to flow with little or no tendency to disperse
        and relatively high incompressibility [syn: {liquidness},
        {liquidity}]
     3: a substance in the fluid state of matter having no fixed
        shape but a fixed volume
     4: a frictionless non-nasal continuant (especially `l' and `r')