ballast

v. stabilize with ballast; steady

n. heavy object used to stabilize boats; gravel; stabilizer

Ballast may mean:Track ballast, railway track-bed, on which sleepers and track is laidSailing ballast, ship's ballast, used to weight a ship downBallast tanks, a device used on submarines and other submersibles to control buoyancyElectrical ballast, used to stabilize the current flow in lampsWater ballast carried aboard an aircraft, for example in gliding to increase speed
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Noun
1. any heavy material used to stabilize a ship or airship
(hypernym) substance, matter
2. coarse gravel laid to form a bed for streets and railroads
(hypernym) gravel, crushed rock
3. an attribute that tends to give stability in character and morals; something that steadies the mind or feelings
(hypernym) attribute
4. a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations)
(synonym) ballast resistor, barretter
(hypernym) resistor, resistance
5. an electrical device for starting and regulating fluorescent and discharge lamps
(synonym) light ballast
(hypernym) electrical device
Verb
1. make steady with a ballast
(hypernym) brace, steady, stabilize, stabilise

n. ballast, heavy object used to stabilize boats; gravel; stabilizer

n. ballast, roadbed, metal