What is mean sea level means.

Question

reduce level

Answer 1

The mean sea level is the mean (or average) height of the sea over time.

It is the "still water level"—the level of the sea with motions such as wind waves averaged out—averaged over a period of time such that changes in sea level, e.g., due to the tides, also get averaged out.

Answer 2

Mean sea level (MSL) is the average (mean) height of the sea, with reference to a suitable reference surface.

Use the source link below ;))

Good Luck!