Lev·el n.
 1. A line or surface to which, at every point, a vertical or plumb line is perpendicular; a line or surface which is everywhere parallel to the surface of still water; -- this is the true level, and is a curve or surface in which all points are equally distant from the center of the earth, or rather would be so if the earth were an exact sphere.
 2. A horizontal line or plane; that is, a straight line or a plane which is tangent to a true level at a given point and hence parallel to the horizon at that point; -- this is the apparent level at the given point.
 3. An approximately horizontal line or surface at a certain degree of altitude, or distance from the center of the earth; as, to climb from the level of the coast to the level of the plateau and then descend to the level of the valley or of the sea.
    After draining of the level in Northamptonshire.   --Sir M. Hale.
    Shot from the deadly level of a gun.   --Shak.
 4. Hence, figuratively, a certain position, rank, standard, degree, quality, character, etc., conceived of as in one of several planes of different elevation.
    Providence, for the most part, sets us on a level.   --Addison.
    Somebody there of his own level.   --Swift.
 Be the fair level of thy actions laid
 As temperance wills and prudence may persuade.   --Prior.
 5. A uniform or average height; a normal plane or altitude; a condition conformable to natural law or which will secure a level surface; as, moving fluids seek a level.
    When merit shall find its level.   --F. W. Robertson.
 6. Mech. & Surv. (a) An instrument by which to find a horizontal line, or adjust something with reference to a horizontal line. (b) A measurement of the difference of altitude of two points, by means of a level; as, to take a level.
 7. A horizontal passage, drift, or adit, in a mine.
 Air level, a spirit level. See Spirit level (below).
 Box level, a spirit level in which a glass-covered box is used instead of a tube.
 Carpenter's level, Mason's level, either the plumb level or a straight bar of wood, in which is imbedded a small spirit level.
 Level of the sea, the imaginary level from which heights and depths are calculated, taken at a mean distance between high and low water.
 Line of levels, a connected series of measurements, by means of a level, along a given line, as of a railroad, to ascertain the profile of the ground.
 Plumb level, one in which a horizontal bar is placed in true position by means of a plumb line, to which it is at right angles.
 Spirit level, one in which the adjustment to the horizon is shown by the position of a bubble in alcohol or ether contained in a nearly horizontal glass tube, or a circular box with a glass cover.
 Surveyor's level, a telescope, with a spirit level attached, and with suitable screws, etc., for accurate adjustment, the whole mounted on a tripod, for use in leveling; -- called also leveling instrument.
 Water level, an instrument to show the level by means of the surface of water in a trough, or in upright tubes connected by a pipe.


 Spir·it n.
 1. Air set in motion by breathing; breath; hence, sometimes, life itself. [Obs.] “All of spirit would deprive.”
 The mild air, with season moderate,
 Gently attempered, and disposed eo well,
 That still it breathed foorth sweet spirit.   --Spenser.
 2. A rough breathing; an aspirate, as the letter h; also, a mark to denote aspiration; a breathing. [Obs.]
    Be it a letter or spirit, we have great use for it.   --B. Jonson.
 3. Life, or living substance, considered independently of corporeal existence; an intelligence conceived of apart from any physical organization or embodiment; vital essence, force, or energy, as distinct from matter.
 4. The intelligent, immaterial and immortal part of man; the soul, in distinction from the body in which it resides; the agent or subject of vital and spiritual functions, whether spiritual or material.
    There is a spirit in man; and the inspiration of the Almighty giveth them understanding.   --Job xxxii. 8.
    As the body without the spirit is dead, so faith without works is dead also.   --James ii. 26.
    Spirit is a substance wherein thinking, knowing, doubting, and a power of moving, do subsist.   --Locke.
 5. Specifically, a disembodied soul; the human soul after it has left the body.
    Then shall the dust return to the earth as it was, and the spirit shall return unto God who gave it.   --Eccl. xii. 7.
 Ye gentle spirits far away,
 With whom we shared the cup of grace.   --Keble.
 6. Any supernatural being, good or bad; an apparition; a specter; a ghost; also, sometimes, a sprite,; a fairy; an elf.
    Whilst young, preserve his tender mind from all impressions of spirits and goblins in the dark.   --Locke.
 7. Energy, vivacity, ardor, enthusiasm, courage, etc.
    =\“Write it then, quickly,” replied Bede; and summoning all his spirits together, like the last blaze of a candle going out, he indited it, and expired.\=   --Fuller.
 8. One who is vivacious or lively; one who evinces great activity or peculiar characteristics of mind or temper; as, a ruling spirit; a schismatic spirit.
    Such spirits as he desired to please, such would I choose for my judges.   --Dryden.
 9. Temper or disposition of mind; mental condition or disposition; intellectual or moral state; -- often in the plural; as, to be cheerful, or in good spirits; to be downhearted, or in bad spirits.
    God has . . . made a spirit of building succeed a spirit of pulling down.   --South.
 A perfect judge will read each work of wit
 With the same spirit that its author writ.   --Pope.
 10. Intent; real meaning; -- opposed to the letter, or to formal statement; also, characteristic quality, especially such as is derived from the individual genius or the personal character; as, the spirit of an enterprise, of a document, or the like.
 11. Tenuous, volatile, airy, or vapory substance, possessed of active qualities.
    All bodies have spirits . . . within them.   --Bacon.
 12. Any liquid produced by distillation; especially, alcohol, the spirits, or spirit, of wine (it having been first distilled from wine): -- often in the plural.
 13. pl. Rum, whisky, brandy, gin, and other distilled liquors having much alcohol, in distinction from wine and malt liquors.
 14. Med. A solution in alcohol of a volatile principle.  Cf. Tincture.
 15. Alchemy Any one of the four substances, sulphur, sal ammoniac, quicksilver, or arsenic (or, according to some, orpiment).
    The four spirits and the bodies seven.   --Chaucer.
 16. Dyeing Stannic chloride. See under Stannic.
 Note: ☞ Spirit is sometimes joined with other words, forming compounds, generally of obvious signification; as, spirit-moving, spirit-searching, spirit-stirring, etc.
 Astral spirits, Familiar spirits, etc. See under Astral, Familiar, etc.
 Animal spirits. (a) Physiol. The fluid which at one time was supposed to circulate through the nerves and was regarded as the agent of sensation and motion; -- called also the nervous fluid, or nervous principle. (b) Physical health and energy; frolicsomeness; sportiveness.
 Ardent spirits, strong alcoholic liquors, as brandy, rum, whisky, etc., obtained by distillation.
 Holy Spirit, or The Spirit Theol., the Spirit of God, or the third person of the Trinity; the Holy Ghost.  The spirit also signifies the human spirit as influenced or animated by the Divine Spirit.
 Proof spirit. Chem. See under Proof.
 Rectified spirit Chem., spirit rendered purer or more concentrated by redistillation, so as to increase the percentage of absolute alcohol.
 Spirit butterfly Zool., any one of numerous species of delicate butterflies of tropical America belonging to the genus Ithomia. The wings are gauzy and nearly destitute of scales.
 Spirit duck. Zool. (a) The buffle-headed duck. (b) The golden-eye.
 Spirit lamp Art, a lamp in which alcohol or methylated spirit is burned.
 Spirit level. See under Level.
 Spirit of hartshorn. Old Chem. See under Hartshorn.
 Spirit of Mindererus Med., an aqueous solution of acetate of ammonium; -- named after R. Minderer, physician of Augsburg.
 Spirit of nitrous ether Med. Chem., a pale yellow liquid, of a sweetish taste and a pleasant ethereal odor. It is obtained by the distillation of alcohol with nitric and sulphuric acids, and consists essentially of ethyl nitrite with a little acetic aldehyde. It is used as a diaphoretic, diuretic, antispasmodic, etc.  Called also sweet spirit of niter.
 Spirit of salt Chem., hydrochloric acid; -- so called because obtained from salt and sulphuric acid. [Obs.]
 Spirit of sense, the utmost refinement of sensation. [Obs.] --Shak.
 Spirits of turpentine, or Spirit of turpentine Chem., rectified oil of turpentine, a transparent, colorless, volatile, and very inflammable liquid, distilled from the turpentine of the various species of pine; camphine.  It is commonly used to remove paint from surfaces, or to dissole oil-based paint.  See Camphine.
 Spirit of vitriol Chem., sulphuric acid; -- so called because formerly obtained by the distillation of green vitriol. [Obs.]
 Spirit of vitriolic ether Chem. ethyl ether; -- often but incorrectly called sulphuric ether.  See Ether. [Obs.]
 Spirits of wine, or Spirit of wine Chem., alcohol; -- so called because formerly obtained by the distillation of wine.
 Spirit rapper, one who practices spirit rapping; a “medium” so called.
 Spirit rapping, an alleged form of communication with the spirits of the dead by raps. See Spiritualism, 3.
 Sweet spirit of niter. See Spirit of nitrous ether, above.
 Syn: -- Life; ardor; energy; fire; courage; animatioon; cheerfulness; vivacity; enterprise.


 spirit level
      n : indicator that establishes the horizontal when a bubble is
          centered in a tube of liquid [syn: level]