"ballast" in the noun sense
1. ballast
any heavy material used to stabilize a ship or airship
2. ballast
coarse gravel laid to form a bed for streets and railroads
3. ballast
an attribute that tends to give stability in character and morals something that steadies the mind or feelings
4. ballast resistor, ballast, barretter
a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations)
5. ballast, light ballast
an electrical device for starting and regulating fluorescent and discharge lamps
"ballast" in the verb sense
1. ballast
make steady with a ballast
Source: WordNet® (An amazing lexical database of English)
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