Définitions
1.NounA soft, white, powdery limestone (calcium carbonate, CaCO3)."chalk cliffs are not recommended for climbing"
2.NounA piece of chalk, or nowadays processed compressed gypsum (calcium sulfate, CaSO4), that is used for drawing and for writing on a blackboard (chalkboard).
3.NounTailor's chalk.
4.NounA white powdery substance used to prevent hands slipping from holds when climbing, or losing grip in weight-lifting or gymnastics, sometimes but not always limestone-chalk, often magnesium carbonate (MgCO3)."when working out your next move, it's a good idea to get some more chalk from the bag"
5.NounA platoon-sized group of airborne soldiers.
6.NounThe favorite in a sporting event.
7.NounThe prediction that there will be no upsets, and the favored competitor will win.
8.VerbTo apply chalk to anything, such as the tip of a billiard cue."chalk your hands before climbing"
9.VerbTo record something, as on a blackboard, using chalk.
10.VerbTo use powdered chalk to mark the lines on a playing field.
11.VerbTo record a score or event, as if on a chalkboard.
12.VerbTo manure (land) with chalk.
13.VerbTo make white, as if with chalk; to make pale; to bleach.