What is the meaning of Calk?

A pointed projection on a horseshoe to prevent its slipping.

A spike on the sole of a boot to prevent slipping, particularly used in logging

Alternative form of caulk (a short sleep, nap)

Alternative spelling of caulk

To make an indentation in the edge of a metal plate, as along a seam in a steam boiler or an iron ship, to force the edge of the upper plate hard against the lower and so fill the crevice.

Alternative form of caulk (to take a short sleep, nap)

To copy (a drawing) by rubbing the back of it with red or black chalk, and then passing a blunt stylus or needle over the lines, so as to leave a tracing on the paper or other thing against which it is laid or held.

Source: wiktionary.org