A type of steatite, used to mark cloth and as a lubricant in shoes, gloves etc.

simple past tense and past participle of chalk up

present participle of chalk up

A line made on a surface by snapping a taut string or cord dusted with colored chalk. / The tool used to make a chalk line.

(academia) An informal lecture on an academic subject. / A music hall act in which a performer makes chalk caricatures whilst reciting a monologue

plural of chalk talk

(climbing) A small pouch attached to a climber's harness, designed to filled with climbing chalk.

(transitive) To draw or write down using chalk / (transitive, figuratively) to make (plans); to sketch

(derogatory, informal) the traditional method of teaching, consisting mainly of talking and writing on a chalkboard.

(UK, informal) By far.