n.
1.a soft whitish calcite
2.a pure flat white with little reflectance
3.amphetamine used in the form of a crystalline hydrochloride
4.a piece of chalk (or similar substance) used for writing on blackboards or other surfaces chalk v.
1.write, draw, or trace with chalk
Idiom of the Day
make (something) up to (someone)
to repay someone for something, to make amends to someone
I was late for work so I had to make it up to my boss by working late.