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ballast (n.)any heavy material used to stabilize a ship or airship;
ballast (n.)coarse gravel laid to form a bed for streets and railroads;
ballast (n.)an attribute that tends to give stability in character and morals; something that steadies the mind or feelings;
ballast (n.)a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations);
Synonyms: ballast resistor / barretter
ballast (n.)an electrical device for starting and regulating fluorescent and discharge lamps;
Synonyms: light ballast
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