(n): the tangible substance that goes into the makeup of a physical object
(n): coarse gravel laid to form a bed for streets and railroads
(n): rock fragments and pebbles
(n): an attribute that tends to give stability in character and morals; something that steadies the mind or feelings
(n): an abstraction belonging to or characteristic of an entity
(n): a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations)
(n): an electrical device that resists the flow of electrical current
(n): an electrical device for starting and regulating fluorescent and discharge lamps
(n): a device that produces or is powered by electricity
(v): make steady with a ballast
(v): support or hold steady and make steadfast, with or as if with a brace