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According to WordNet, the noun "ballast" has 5 sense(s).
102779971 an electrical device for starting and regulating fluorescent and discharge lamps.
104691992 an attribute that tends to give stability in character and morals; something that steadies the mind or feelings.
102780121 a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations).
114699209 coarse gravel laid to form a bed for streets and railroads.
- SUMO Mappings: Device (subsuming mapping)
102779845 any heavy material used to stabilize a ship or airship.
- SUMO Mappings: Gravel (subsuming mapping)
- SUMO Mappings: Object (subsuming mapping)
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