Nautical. any heavy material carried temporarily or permanently in a vessel to provide desired draft and stability.
Aeronautics. something heavy, as bags of sand, placed in the car of a balloon for control of altitude and, less often, of attitude, or placed in an aircraft to control the position of the center of gravity.
anything that gives mental, moral, or political stability or steadiness:
the ballast of a steady income.
gravel, broken stone, slag, etc., placed between and under the ties of a railroad to give stability, provide drainage, and distribute loads.
Also called ballast resistor. a device, often a resistor, that maintains the current in a circuit at a constant value by varying its resistance in order to counteract changes in voltage.
a device that maintains the current through a fluorescent or mercury lamp at the desired constant value, sometimes also providing the necessary starting voltage and current.
to furnish with ballast:
to ballast a ship.
to give steadiness to; keep steady:
parental responsibilities that ballast a person.
in ballast, Nautical. carrying only ballast; carrying no cargo.
any dense heavy material, such as lead or iron pigs, used to stabilize a vessel, esp one that is not carrying cargo
crushed rock, broken stone, etc, used for the foundation of a road or railway track
coarse aggregate of sandy gravel, used in making concrete
anything that provides stability or weight
(electronics) a device for maintaining the current in a circuit
to give stability or weight to
“heavy material used to steady a ship,” 1520s, from Middle English bar “bare” (see bare; in this case “mere”) + last “a load, burden,” or borrowed from identical terms in North Sea Germanic and Scandinavian (cf. Old Danish barlast, 14c.). “Mere” because not carried for commercial purposes. Dutch balg-last “ballast,” literally “belly-load,” is a folk-etymology corruption.
Nautical. any heavy material carried temporarily or permanently in a vessel to provide desired draft and stability. Aeronautics. something heavy, as bags of sand, placed in the car of a balloon for control of altitude and, less often, of attitude, or placed in an aircraft to control the position of the center of gravity. anything […]
a 14th-century Italian verse form composed of stanzas beginning and ending with a refrain, often set to music and accompanied by dancing. Historical Examples The same lady is more directly celebrated in the next ballata, where Poliziano calls her by her name, Ippolita. Sketches and Studies in Italy and Greece, Second Series John Addington Symonds […]
an arduous, often unpleasant task. a person who makes great demands on others; taskmaster. noun (slang) a person, esp a woman, whose character and behaviour may be regarded as threatening a man’s sense of power noun See ball-breaker noun Something that is very difficult to accomplish; a Herculean task; killer (1950+) Someone who assigns and […]
a spherical or approximately spherical body or shape; sphere: He rolled the piece of paper into a ball. a round or roundish body, of various sizes and materials, either hollow or solid, for use in games, as baseball, football, tennis, or golf. a game played with a ball, especially baseball: The boys are out playing […]