Definitions for ballastˈbæl əst
Random House Webster's College Dictionary
a heavy material carried on a vessel to control draft and stability or a balloon to control altitude.
gravel or broken stone placed under the ties of a railroad.
a device that maintains the current in an electric circuit at a constant value and may also provide the starting voltage, as in a fluorescent lamp.
Category: Electricity and Magnetism
(v.t.)to furnish with ballast.
Category: Nautical, Navy
Origin of ballast:
1520–30; < MLG, perh. ult. < Scand; cf. early Dan and Sw barlast=barbare1+last load
any heavy material used to stabilize a ship or airship
coarse gravel laid to form a bed for streets and railroads
an attribute that tends to give stability in character and morals; something that steadies the mind or feelings
ballast resistor, ballast, barretter(noun)
a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations)
ballast, light ballast(verb)
an electrical device for starting and regulating fluorescent and discharge lamps
make steady with a ballast
Heavy material that is placed in the hold of a ship (or in the gondola of a balloon), to provide stability.
Anything that steadies emotion or the mind.
Coarse gravel or similar material laid to form a bed for roads or railroads.
A material, such as aggregate or precast concrete pavers, which employs its mass and the force of gravity to hold single-ply roof membranes in place.
device used for stabilizing current in an electric circuit (e.g.in a tube lamp supply circuit)
To stabilize or load a ship with ballast.
To lay ballast on the bed of a railroad track.
any heavy substance, as stone, iron, etc., put into the hold to sink a vessel in the water to such a depth as to prevent capsizing
any heavy matter put into the car of a balloon to give it steadiness
gravel, broken stone, etc., laid in the bed of a railroad to make it firm and solid
the larger solids, as broken stone or gravel, used in making concrete
fig.: That which gives, or helps to maintain, uprightness, steadiness, and security
to steady, as a vessel, by putting heavy substances in the hold
to fill in, as the bed of a railroad, with gravel, stone, etc., in order to make it firm and solid
to keep steady; to steady, morally