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A passage for wind or air; a passage or pipe for ventilating apartments. Gwilt.

To open and expose to the free passage of air; to supply with fresh air, and remove impure air from; to air; as, to ventilate a room; to ventilate a cellar; to ventilate a mine.

ct of ventilating, or the state of being ventilated; the art or process of replacing foul air by that which is pure, in any inclosed place, as a house, a church, a mine, etc.; free exposure to air. Insuring, for the laboring man, better ventilation. F. W. Robertson.

ation; especially, a contrivance or machine for drawing off or expelling foul or stagnant air from any place or apartment, or for introducing that which is fresh and pure.

ange of form, direction, or the like; transformation; conversion; turning. The version of air into water. Bacon.

Of or pertaining to vesicles; esp., of or pertaining to the air vesicles, or air cells, of the lungs; as, vesicular breathing, or normal breathing, in which the air enters freely the air vesicles of the lungs.

tuent particles move to and fro, with alternate compression and dilation of parts, as the air, or any elastic body; to quiver.

disturbed, as when a stretched cord or other body produces musical notes, or particles of air transmit sounds to the ear. The path of the particle may be in a straight line, in a circular arc, or in any curve whatever.

Wanting purity; foul; bad; noxious; as, vicious air, water, etc. Dryden.

e eye; invisible; unseen. "Viewless winds." Shak. Swift through the valves the visionary fair Repassed, and viewless mixed with common air. Pope.

struck with a bow, and the neck furnished with frets for stopping the strings. Me softer airs befit, and softer strings Of lute, or viol still, more apt for mournful things. Milton.

s reason and controls his judgment; an unpractical schemer; one who builds castles in the air; a daydreamer.

g to sight; used in sight; serving as the instrument of seeing; as, the visual nerve. The air, Nowhere so clear, sharpened his visual ray. Milton.

Hippocrates . . . affirm the birth of the seventh month to be vital. Sir T. Browne. Vital air, oxygen gas; -- so called because essential to animal life. [Obs.] -- Vital capacity (Physiol.), the breathing capacity of the lungs; -- expressed by the number of cubic inches of air which can be forcibly exhaled after a full…

faulty, or imperfect; to render defective; to injure the substance or qualities of; to impair; to contaminate; to spoil; as, exaggeration vitiates a style of writing; sewer gas vitiates the air. A will vitiated and growth out of love with the truth disposes the understanding to error and delusion. South. Without care i…

set to words, to be performed by the human voice. -- Vocal tube (Anat.), the part of the air passages above the inferior ligaments of the larynx, including the passages through the nose and mouth.

tion for the time; -- used now generally in the phrase in vogue. One vogue, one vein, One air of thoughts usurps my brain. Herbert. Whatsoever its vogue may be, I still flatter myself that the parents of the growing generation will be satisfied with what Burke. Use may revive the obsoletest words, And banish those that…

Passing through the air upon wings, or as if upon wings; flying; hence, passing from place to place; current. English silver now was current, and our gold volant in the pope's court. Fuller.

Passing through the air on wings, or by the buoyant force of the atmosphere; flying; having the power to fly. [Obs.]

A popular song, or national air.