ballast

phonetic symbol: / bǽləst / 
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ballast - English Dictionary

[ noun ]
■ any heavy material used to stabilize a ship or airship

[ noun ]
■ an electrical device for starting and regulating fluorescent and discharge lamps
light ballast

[ noun ]
■ a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations)
ballast resistor , barretter

[ noun ]
■ an attribute that tends to give stability in character and morals
■ something that steadies the mind or feelings

[ noun ]
■ coarse gravel laid to form a bed for streets and railroads

[ verb ]
■ make steady with a ballast

Word list en

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