What is the meaning of Pointing?

The action of the verb to point.

The filling of joints in brickwork or masonry with mortar.

Mortar that has been placed between bricks to fill the gap.

The act or art of punctuating; punctuation.

The rubbing off of the point of the wheat grain in the first process of high milling.

The act or process of measuring, at the various distances from the surface of a block of marble, the surface of a future piece of statuary; also, a process used in cutting the statue from the artist's model.

present participle and gerund of point

Source: wiktionary.org