Influence or influencer may refer to: Social influence, in social psychology, influence in interpersonal relationships Minority influence, when the minority affect the behavior or beliefs of the majority Influencer marketing, through individuals that have influence over potential buyers Science and technology Sphere of influence (astrodynamics), the region around a celestial body in which it is the primary gravitational influence on orbiting objects Sphere of influence (black hole), a region around a black hole in which the gravity of the black hole dominates that of the host galaxy's bulgePolitics Undue influence, in contract law, where one person takes advantage of a position of power over another person Sphere of influence, in political science, an area over which a state or organization has some indirect control Agent of influence, an agent of some stature who uses his or her position to influence public opinion or decision making to produce results beneficial to the country...