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A tower or other building with a powerful light at top, erected at the entrance of a port, or at some important point on a coast, to serve as a guide to mariners at night; a pharos.

A French mechanical lamp, for lighthouses, in which a superbundance of oil is pumped to the wick tube by clockwork.

r layers, extending in a succession of annular rings beyond the central lens; - - used in lighthouses.

for land and seacoast defense, the improvement of rivers and harbors, the construction of lighthouses, etc., and, in time of war, supervises the engineering operations of the armies in the field.

A lighthouse, or the apparatus placed in it for giving light.

a fictious strength to liquors. Flash light, or Flashing light, a kind of light shown by lighthouses, produced by the revolution of reflectors, so as to show a flash of light every few seconds, alternating with periods of dimness. Knight. -- Flash in the pan, the flashing of the priming in the pan of a flintlock musk…

e oil tube of an Argand lamp to keep the oil limpid on cold nights; -- used especially in lighthouses. Knight. -- Frost nail, a nail with a sharp head driven into a horse's shoe to keen him from slipping. -- Frost smoke, an appearance resembling smoke, caused by congelation of vapor in the atmosphere in time of sever…

r reflectors to collect the rays of light and throw them in a given direction; -- used in lighthouses.

amp or candle within; sometimes fixed, as the glazed inclosure of a street light, or of a lighthouse light.

That which furnishes, or is a source of, light, as the sun, a star, a candle, a lighthouse, etc. Then he called for a light, and sprang in. Acts xvi. 29. And God made two great lights; the greater light to rule the day, and the lesser light to rule the night. Gen. i. 16.

A beacon tower; a lighthouse. [Obs.]

A pharos; a lighthouse. [Obs.]

The art or science which treats of lighthouses and signal lights.

A lighthouse or beacon for the guidance of seamen. He . . . built a pharos, or lighthouse. Arbuthnot.

lens (Opt.), a lens made up of pieces arranged zones or rings, -- used in the lanterns of lighthouses.

pass. Cowper. Revolving firearm. See Revolver. -- Revolving light, a light or lamp in a lighthouse so arranged as to appear and disappear at fixed intervals, either by being turned about an axis so as to show light only at intervals, or by having its light occasionally intercepted by a revolving screen.…

or quality. "Bore us some leagues to sea." Shak. On its outer point, some miles away. The lighthouse lifts its massive masonry. Longfellow.