What is Persuasion?

Legal Definition
Persuasion is an umbrella term of influence. Persuasion can attempt to influence a person's beliefs, attitudes, intentions, motivations, or behaviors. In business, persuasion is a process aimed at changing a person's (or a group's) attitude or behavior toward some event, idea, object, or other person(s), by using written or spoken words to convey information, feelings, or reasoning, or a combination thereof. Persuasion is also an often used tool in the pursuit of personal gain, such as election campaigning, giving a sales pitch, or in trial advocacy. Persuasion can also be interpreted as using one's personal or positional resources to change people's behaviors or attitudes. Systematic persuasion is the process through which attitudes or beliefs are leveraged by appeals to logic and reason. Heuristic persuasion on the other hand is the process through which attitudes or beliefs are leveraged by appeals to habit or emotion.
-- Wikipedia
Legal Definition
The act of influencing by expostulation or request. While the persuasion is confined within those limits which leave the mind free, it may be used to induce another to make his will, or even to make it in his own favor; but if such persuasion should so far operate on the mind of the testator, that he would be deprived of a perfectly free will, it would vitiate the instrument. 3 Serg. & Rawle, 269; 5 Serg. & Rawle, 207; 13 Serg. & Rawle, 323.
-- Bouviers Law Dictionary
Legal Definition
The act of persuading; the act of influencing the mind by arguments or reasons offered or by anything that moves the mind or passions or inclines the will to a determination. See Marx v. Threet, 133 Ala. 340, 30 South. 831.
-- Black's Law Dictionary