n. [ AS. cealc lime, from L. calx limestone. See Calz, and Cawk. ] 1. (Min.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as common limestone. [ 1913 Webster ]

2. (Fine Arts) Finely prepared chalk, used as a drawing implement; also, by extension, a compound, as of clay and black lead, or the like, used in the same manner. See Crayon. [ 1913 Webster ]

Black chalk, a mineral of a bluish color, of a slaty texture, and soiling the fingers when handled; a variety of argillaceous slate. --
By a long chalk, by a long way; by many degrees. [ Slang ] Lowell. --
Chalk drawing (Fine Arts), a drawing made with crayons. See Crayon. --
Chalk formation. See Cretaceous formation, under Cretaceous. --
Chalk line, a cord rubbed with chalk, used for making straight lines on boards or other material, as a guide in cutting or in arranging work. --
Chalk mixture, a preparation of chalk, cinnamon, and sugar in gum water, much used in diarrheal affection, esp. of infants. --
Chalk period. (Geol.) See Cretaceous period, under Cretaceous. --
Chalk pit, a pit in which chalk is dug. --
Drawing chalk. See Crayon, n., 1. --
French chalk, steatite or soapstone, a soft magnesian mineral. --
Red chalk, an indurated clayey ocher containing iron, and used by painters and artificers; reddle. [ 1913 Webster ]

v. t. [ imp. & p. p. Chalked p. pr. & vb. n. Chalking. ] 1. To rub or mark with chalk. [ 1913 Webster ]

2. To manure with chalk, as land. Morimer. [ 1913 Webster ]

3. To make white, as with chalk; to make pale; to bleach. Tennyson. [ 1913 Webster ]

Let a bleak paleness chalk the door. Herbert. [ 1913 Webster ]

To chalk out, to sketch with, or as with, chalk; to outline; to indicate; to plan. [ Colloq. ] “I shall pursue the plan I have chalked out.” Burke. [ 1913 Webster ]

n. a dark sheet of slate used as a surface for writing on, with chalk.
Syn. -- blackboard. [ WordNet 1.5 ]

n. A man who digs chalk. [ 1913 Webster ]

n. The state of being chalky. [ 1913 Webster ]

n. 1. a string impregnated with powdered chalk, used in construction to mark a straight line on a surface, such as a wall. The string is held taut on the surface between the two end points of the line to be made, the center of the line is drawn away from the surface, and the string is released and snapped against the surface, leaving a line of chalk in the desired location. [ PJC ]

2. the line of chalk on a surface left by a chalk line{ 1 }. [ PJC ]

n. a quarry for mining chalk. [ WordNet 1.5 ]

n. 1. A mass of chalk. [ 1913 Webster ]

As chalkstones . . . beaten in sunder. Isa. xxvii. 9. [ 1913 Webster ]

2. (Med.) A chalklike concretion, consisting mainly of urate of sodium, found in and about the small joints, in the external ear, and in other situations, in those affected with gout; a tophus. [ 1913 Webster ]

a. Consisting of, or resembling, chalk; containing chalk; as, a chalky cliff; a chalky taste. [ 1913 Webster ]