What is the meaning of the word "level"?

Definitions:

a flat surface at right angles to a plumb line noun
- Park the car on the level.
a position on a scale of intensity or amount or quality noun
- That was a level four earthquake.
a relative position or degree of value in a graded group noun
- They are level 100 green wizards.
a specific identifiable position in a continuum or series or especially in a process noun
- I finally made it to level 4 in Double Dragon!
a structure consisting of a room or set of rooms at a single position along a vertical scale noun
- What level is the office on?
aim at verb
- level criticism or charges at somebody
an abstract place usually conceived as having depth noun
- A good actor communicates on several levels.
become level or even verb
- The ground levelled off.
being on a precise horizontal plane adjective
- a billiard table must be level
height above ground noun
- The water reached ankle level.
indicator that establishes the horizontal when a bubble is centered in a tube of liquid noun
- Bring me a level. This board looks slightly askew.
make level or straight verb
- level the ground
not showing abrupt variations adjective
- spoke in a level voice
oriented at right angles to the plumb adjective
- the picture is level
talk frankly with verb
- Let me level with you son. You are not getting a car for your birthday.
tear down so as to make flat with the ground verb
- The building was levelled