(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

(UK, informal) By far.

(idiomatic) To record a score or event, as if on a chalkboard. / (idiomatic) To disallow or cancel

plural of chalk line

chalk line

A slaty bluish mineral, a variety of argillaceous slate, used for drawing and for making black paint.

A preparation of chalk, cinnamon, and sugar in gum water, formerly used to treat diarrhea in infants.