1. The extent or measurement downward from a surface: depth, drop.

What is the meaning of deepness?

the property of being very deep; without limit. type of: depth. the extent downward or backward or inward. the extent downward or backward or inward. synonyms: depth.

Does depth mean deepness?

Depth is the measure of how deep something goes. ... The expression "plumb the depths" means to take a measure of how deep something goes. Depth also can mean deepness—your English teacher might instruct you to write papers with depth.