means The act of yielding to another's authority, will, or control — or a thing formally handed over for consideration, like a manuscript or an application.

from From Latin submissio, 'a lowering, a sinking down,' built from sub- ('under') and mittere ('to send, to put'). So at its root it literally means to send yourself under — to place yourself beneath another. The same mittere gives us a whole family: mission (a sending forth), permit (a sending through), transmit (a sending across). Submission is the one that sends you downward.