What is the meaning of Ascender?

A person or thing that ascends.

The portion of a lowercase letter that extends above the midline.

A lowercase letter that has such a portion, such as d or h.

a mechanical device used for ascending on a rope; ascendeur.

to ascend, go up

to ascend; to rise

to ascend, to mount, to climb

to advance

to rise

Source: wiktionary.org